« PreviousContinue »
In the Zoologist for December Mr. A. H. Patterson Philosophical Society. In the most important of these the records a number of more or less remarkable specimens of author discusses the origin of the mammalian carpus and fishes captured off Great Yarmouth during the year. tarsus. After a brief review of the nature of these two Several examples of flat-fish with the two sides of the portions of the skeleton in other groups, Dr. Broom points same colour are recorded, a plaice of this type being her out that in dicynodonts and theriodonts the mammalian remarkable from the fact that the dorsal and anal fins approximation is most marked. To quote his own words, united beneath the tail. In a second article Mr. G.“ In these latter we find more or less approximation to the Dalgleish directs attention to the recent migration into mammalian type, but if we take into consideration the India of birds native of eastern Central Asia--notably the extreme mammalian specialisation-the presence of a large mandarin-duck.
tibiale and fibulare, with a centrale which is not in the The October issue of the Proceedings of the Philadelphia
centre but comes between the tibiale and the first tarsale, Academy contains two papers devoted to the histology and
then we are driven to the conclusion that the mammalian early development of invertebrates. In the first Dr. J. A.
ancestor must have been a dicynodont, a theriodoni, or a Nelson discusses that puzzling creature Dinophilus, referred
form belonging to a closely allied order. From the ex. by some authorities to the turbellarians, and by others to the
amination of the skull we have good reason to believe that annelids. · If the “ trochophore " be regarded as a larval
the ancestor was a theriodont, and the evidence of the form common at least to all annelids, the development of
tarsus fully confirms that drawn from the skull and othe Dinophilus cannot be considered as primitive. Rather it
parts of the skeleton ; and the carpus, while it does not add may be looked upon as an annelid the larval stage of which
any very strong evidence, certainly does not afford any has become one towards which development tends, and
evidence that is not in harmony with this conclusion." which has consequently become specially modified. In the A REMARKABLE instance of what the author thinks may be second of the two papers Mr. T. H. Montgomery gives the true mimicry among plants is described by Dr. R. Marloth results of his investigations into the development and in the Transactions of the South African Philosophical structure of the larva of the parasitic thread-worm Society, vol. xv. p. 97. Years ago, it appears that the Paragordius.
traveller Burchell picked up on stony ground an object he The December issue (vol. vii., No. 2) of the Journal of
mistook for a pebble, but which on exaimnation proved to be the Marine Biological Association of the United Kingdom
a plant of the genus Mesembrianthemum. Both in colour contains a full list of the marine invertebrate fauna of
and in form this plant, previously named M. Iruncatum, Plymouth, compiled from the records of the association. presented a remarkable resemblance to the stones among An excellent map of the Plymouth district accompanies the
which it grew. A second species, M. bolusi, growing on list, together with notes on the various dredging-grounds
the hills around the Karru, generally produces two leaves and their characteristic zoological products. Some of these
about the size of a duck's egg, which have a surface like grounds, which formerly yielded rich harvests, have been
weathered stone, and a brownish grey colour tinged with more or less completely spoiled by being made the receptacle
green. In this state it closely resembles the surrounding for rubbish and refuse from the neighbouring towns.
stone, although for a short time its bright yellow flowers Attention is directed to the large number of species of
render it conspicuous enough. M. nobile is very similar. marine organisms attacking the limestone of which the
A fourth species of the genus, together with Plymouth breakwater is constructed. To such an extent,
Anacampseros papyracea (in which the leaves are covered indeed, is the stone eaten into by these creatures that con
with white papery stipules), resembles the quartz pebbles siderable damage is done to the structure, and constant
among which it grows. In the author's opinion, M. bolusi, repairs are rendered necessary.
M. nobile, and perhaps M. truncatum (which, unlike some
of the other plants mentioned, do not change their We have received copies of three papers by Dr. J. E.
characters under cultivation), may afford instances of true Duerden dealing with the morphology, development, and
mimicry, or “ homoplasy." relations of corals and sea-anemones. Their titles are respectively “ The Antiquity of the Zoanthid Actinians" We have received a report on forestry in the Transvaal (Rep. Michigan Acc., No. 6, pp. 195-8), Recent Results by Mr. D. E. Hutchins, conservator of forests, Cape Town. on the Morphology and Development of Coral-Polyps' The report deals with the immediate necessity for the (Smithson. Miscell. Contrib., vol. xlvii. pp. 93-101), and afforestation of those large tracts of land in the colony which
The Morphology of the Madreporaria, No. 5 (Biol. are unsuitable for agriculture. The importance of forestry Bull., vol. vii., No. 2). The main thesis of the first two in the Transvaal cannot be over-estimated, as a perusal of papers is that, since ordinary hexamerous coral-polyps differ this report will show. After a tour of inspection, Mr. from sea-anemones to a great extent only by the absence
Hutchins has been able to indicate in his report the organof a skeleton, and the presence of such skeleton is a isation and equipment necessary for the scheme. A list of secondary development, the second group must be older trees suitable for cultivation in the Transvaal is given, than the first. From this basis it is argued that the together with short notes on their sylvicultural charactertropical polyps known as zoanthids, which differ in regard
istics and uses. It may be interesting to mention that the to the number of their septa from the hexamerous group, common ash, Fraxinus excelsior, does not thrive in the bear a similar relationship to the Palæozoic tetramerous
Transvaal. rugose "corals, and are consequently of still more ancient origin. In the author's own words, “ The Rugosa and
Messrs. F. Darton and Co., St. John Street, E.C., hare Zoantheæ undoubtedly constitute
submitted to us a very handy and portable little instrument,
barometer, invented by Mr. A. S. Davis. skeleton-forming and skeletonless polyps, just as do the
It consists of a glass tube about seven inches long, bent modern Madreporaria and ordinary hexamerous Actiniaria."
in the form of a syphon, the longer arm being of strong THREE papers by Dr. R. Broom on the fossil reptiles of capillary tubing of one-tenth inch bore, the shorter arm South Africa and their relationship to mammals appear in being of thin quill tubing. The end of the longer tube vol. xxv., part iii., of the Transactions of the South African opens into a small cast iron cistern, containing mercury:
when the instrument is out of action the tube lies hori- Messrs. MACMILLAN AND Co., Ltd., have published an zontally, and the mercury lies on one side of the cistern, edition of “ An Elementary Course of Mathematics," by leaving the open end of the tube exposed to the air. When Messrs. H. S. Hall and F. H. Stevens, in which parts i. che tube is brought into a vertical position the mercury and ii. of the authors' School Geometry have been flows over and closes the mouth of the tube, and then substituted for the parts of Euclid's elements contained in flows down the tube to a greater or less depth, dependent previous editions. upon the atmospheric pressure at the time. We have made
Messrs. F. Vieweg AND SON, Brunswick, have issued a number of comparisons with a mercurial standard baro
the fifth edition of Wiedemann and Ebert's comprehensive meter, and find that its indications are correct to within
work on practical physics—“ Physikalisches Praktikum." about 0.12 inch. The readings, to the nearest tenth of an
The book contains a good systematic course of practical inch, or, by interpolation, to the hundredth of an inch,
work in physics, the experiments being well arranged and can be rapidly obtained. As a weather-glass it appears to
clearly illustrated. be very useful, and even less likely to get out of order than an aneroid, but it would not be suitable for accurate The issue of the Antiquary for January commences the scientific observations like an ordinary mercurial barometer. first volume of a new and enlarged series. The magazine, It has the advantage of being less costly, small in size, and which is devoted to the study of the past, has been enlarged easier of transport than an ordinary barometer.
by the addition of eight pages. A new section, called “ At We have received from Messrs. C. F. Adolph and Co., the Sign of the Owl,” has been introduced, and consists of of 14 Farringdon Road, E.C., their new price list of about two pages of notes concerning books of archæological selenium cells and apparatus. This firm has introduced a interest. A good selection of articles is promised for the new type of selenium cell which possesses the advantage present year. over the old form of cell that it is exposed to the light on two surfaces with a consequent increase in the sensibility subject list of works on the fine and graphic arts (including
There has now been published at the Patent Office a of fully 75 per cent. Complete sets of apparatus for demonstrating the sensitiveness of selenium to light and
photography), and art industries, in the library of the
Patent Office. The list consists of two parts—a general the transmission of sound by means of light
alphabet of subject headings, with entries in chronological described and illustrated in the list.
order of the works arranged under these headings, and a I* No. 21 of the Physikalische Zeitschrift Mr. Josef key, or summary, to these headings shown in class order. Rosenthal describes a number of improvements which he
The catalogue includes some 2916 works, representing 5373 has introduced in the construction of mercury air-pumps of
volumes. the Sprengel type. These pumps usually suffer from the disadvantage that the glass tube in which the mercury falls is liable to sudden fracture after the pump has been in action
OUR ASTRONOMICAL COLUMN. during a few weeks. The fracture appears to be due to the Another New Comet (1904 e).—A telegram from the friction of the mercury on the glass producing an electrical Kiel Centralstelle announces the discovery of a new comet charge which, by influencing the moist air without, con- by M. Borrelly at Marseilles on December 29, 1904. The verts the glass wall of the tube into the insulator of a
position of the object at gh. 7m. (Marseilles M.T.) was condenser. The possibility of a discharge through the glass
R.A. = 1h. 13m. 40s., dec. = -10° o', is eliminated by surrounding the dropping tube with a larger and its apparent daily movement was found to be + 1.6m. glass tube filled with oil, which acts as an efficient in- in R.A. and – 54' in declination. A nucleus was seen. sulator. It is stated that a tube protected in this way lasted
A further telegram states that the comet was observed five months, although in daily use.
by Dr. Cohn at Königsberg on December 31 at 6h. 22.2m.
(Königsberg M.T.), when its position was as follows :The American Journal of Science for November, 1904,
R.A. = 1h. 15m. 56.535., dec. = -8° 29' 59". contains an investigation by Mr. Bertram B. Boltwood of the radio-activity of natural waters which is of particular
The position of the comet is near to that of a Ceti. interest because of an attempt that is made to explain its Comet 1904 d (GIACOBINI).—Further observations of origin. It is shown that neither hot nor cold water dis
comet 1904 d are published in No. 3986 of the Astronomische solves any appreciable quantity of radium, as such, from a
Nachrichten, together with Herr Ebell's elements and
ephemeris. A photograph taken at the Konigstuhl Observmass of finely powdered uranium minerals consisting
atory, Heidelberg, on December 19d. 17h. 37.3m. (Konigsprincipally of uranophane, although a brief contact with tuhl M.T.) showed a short tail and a complex nucleus, these minerals is sufficient to impart to water enough of whilst the position of the object for 1904.0 was the radium emanation to produce a very marked radio- R.A. (app.)=16h. 19m. 38.8s., dec. (app.)= +28° 23' 9". activity, Water can also acquire a measurable quantity of
OBSERVATIONS OF LEONIDS AT HARVARD, 1904.-Several the radium emanation by simple contact with gaseous observers at Harvard kept the eastern part of the sky under mixtures which contain it. It is considered that observation for meteors from 12h. to 17h. on the night of extremely minute trace of uranium minerals in the rocks November 14-15. As a rule, four observers kept watch, and soils through which a water percolates would be
whilst a fifth wrote down their results, and between them sufficient to impart to it a measurable radio-activity. But
they saw 275 meteors, of which 183 were Leonids.
The following table shows the horary rate, for a single waters such as those of Bath and Baden Baden, which con
observer, at intervals of twenty minutes :tain true dissolved radium, must owe the presence of the
Nov. 14-15 Rate Nov. 14-15 Rate
Rate latter to a special decomposition taking place under the influence of high temperature and great pressure.
14 40 40
28 Messrs. LONGMANS AND Co. have in the press a trans
25 lation, by Mr. J. Garcin, of M. Blondlot's papers on n-says communicated to the Paris Academy of Sciences.
Of the total number 35 were of the first magnitude or The brighter, but none exceeded magnitude
At the volume will contain additional notes and instructions for
moment of explosion the heads were generally blue or white, the construction of phosphorescent screens.
but in two cases, at least, the colour was clearly red or
h. m. 16 40
16 20 ...
orange, probably indicating, according to Prof. W. H. Eclipse RESULTS AND PROBLEMS.-In the December (1904) Pickering, a different chemical constitution.
number of the Bulletin de la Société astronomique de Franse The radiant appeared to cover a considerable area, about M. le Comte de la Baume Pluvinel reviews the results 80 in diameter, and seemed to be double, the two principal obtained during the total solar eclipses of the last thuti centres being situated at R.A. =gh. 50m., dec. = +24o, and years, and in connection with the study of each rclips at R.A. =9h. 4om., dec. = +26°.
phenomenon he outlines the problems which yet rruuire Although elaborate preparations were made for securing further elucidation. To those interested in eclipse work photographs, only two trails appeared on the resulting the article will be found to be a useful résumé. negatives. One, due to a Leonid, commenced at R.A. =
BIBLIOGRAPHY OF CONTEMPORARY ASTRONOMICAL WORKS gh. 17.2m., dec. = +28° 57', and ended at R.A.=gh. 8.8m.,
We have received from Prof. Ernest Lebon, of the Lycée dec. = +29° 52', a more careful measure showing that the meteor passed through a point having the posi- bibliography of contemporaneous writings on historical
Charlemagne, Paris, an extract from a plan of an analytical tion R.A. =gh. 57.om., dec. = +24° 14' (1855). The other trail extended from R.A. = 4h. 52.5m., dec. = +0° 52', to
work in astronomy, as submitted by him to the International
Congress of Historical Science held at Rome in April, 1903. R.A. = 5h. 10.7m., dec. = -4° 39' (1855), and was, there
Judging from the list of authors named in the plan and fore, not due to a Leonid (Harvard College Observatory
the specimen extracts given therein, the bibliography will Circular, No. 89).
be found extremely useful by those workers in astronomy LIGHT-CURVE OF & CEPHEI.—Employing the method used who have occasion to refer to previous results obtained since by Dr. W. J. S. Lockyer in his discussion of the observ- 1846. ations of n Aquilæ (Göttingen, 1897), Dr. B. Meyerman has reduced the observations of 8 Cephei.
As a result he obtained the following as the formula for PRIZES PROPOSED BY THE PARIS ACADEMY determining the epochs of maxima :
OF SCIENCES FOR 1905. 1840 September 26-3588+5-366404 E. (Bonn).
EOMETRI.-The Franccur prize (1000 francs), for A comparison of the phases determined from this formula
discoveries or work useful for the progress of pure or with observed values gives small differences which compare
applied mathematics; the Poncelet prize (2000 francs), ior favourably with those previously obtained by other observers. work in applied mathematics. The new observations are consistent with an invariable Mechanics.-A Montyon prize (700 francs), for the inperiod (Astronomische Nachrichten, No. 3985).
vention or improvement of instruments useful in the progress
of agriculture, the mechanical arts or sciences; the STRUCTURE THE THIRD CYANOGEN BAND.-Some
Poncelet prize (2000 francs), for a work on applied matheinteresting results concerning the structure of the third matics; the Fourneyron prize (1000 francs), for a memoir cyanogen band have been obtained by Herr Franz Jung
on the theoretical or experimental study of steam turbines. bluth at Bonn. By employing the third order of a Rowland
Navigation.—The extraordinary prize of 6000 francs as grating having 630 lines to the millimetre (i.e. about 16,000
a recompense for any work tending to increase the efficiency to the inch) and a focal length of 6.6 metres (about
of the French naval forces; the Plumey prize (2500 francs), 21.6 feet), he obtained a greater dispersion than has hitherto
for an improvement in steam engines or any other invention been used for this purpose.
contributing to the progress of steam navigation, His results, stated briefly, are as follow :-(1) the third
Astronomy. The Pierre Guzman prize (100,000 francsi, cyanogen band consists of double lines; (2) the maximum
for the discovery of a means of communicating with any intervals between successive lines in the four strongest series celestial body other than the planet Mars; failing the award form an arithmetical progression ; (3) the view of King, that of the capital sum, the interest will be awarded every five the inverted “heads are to be regarded as tails " of the
years for a work important to the progress of astrononi. bands connected with the known“ heads," possesses a high The Lalande prize (540 francs), for the observation, memoir, degree of probability ; (4) the connection of groups of or work most useful to the progress of astronomy; the · heads and “ tails" is such that the first head" and
Valz prize (460 francs), and the G. de Pontécoulant prize the last “ tail” belong to the same series, the second (700 francs), under similar conditions. The Damoiseau “ head')
to the penultimate “ tail," and so on; (5) the prize (2000 francs); the question proposed for this prize is hypothesis of Thiele, that the intervals between successive as follows:-there are a dozen comets the orbit of which, lines in a band increase only to a certain point and then during the period of visibility, is shown to be of a hyperdecrease until the series ends in a tail, appears to be correct; bolic nature. The problem set is to find out whether this (6) the lengths of the successive series form an arithmetical
was the case before the arrival of the comet in the solar progression (Astrophysical Journal, vol. xx., No. 4).
system, going back to the past history of the comet, and New REFRACTION TABLES.-A set of new refraction tables
allowing for the perturbations of the planets. whereby one may find the refraction correction to 0.01 of a
Geography.--The Gay prize (1500 francs), for an explorer second of arc are given in No. 3983 of the Astronomische
in Africa who has determined with great precision the Nachrichten by Dr. L. de Ball, of Vienna. The tables are
geographical coordinates of the principal points on his adaptable to range of atmospheric temperatures and
journey ; the Tchihatchef prize (3000 francs), as a recompressures and of zenith distances. Knowing the temperature pense or encouragement for naturalists of any nationality and pressure at the place of observation, one finds the
who have most distinguished themselves in the exploration logarithm of the actual density of the atmosphere from
of the Asiatic continent, more especially in the lesser known table i., and with this and the known zenith distance finds
regions; the Binoux prize (2000 francs). the refraction correction to the second decimal of a second
Physics.—The Hébert prize (1000 francs), for a discovery of arc from table ii.
or treatise on the popular applications of electricity; the
Hughes prize (2500 francs), for a work contributing to the Tue “ ANNUAIRE " DU BUREAU DES LONGITUDES.-Con- progress of physics; the Gaston Planté prize (3000 franca. tinuing the scheme inaugurated in last vear's “ Annuaire
for a discovery, invention, or important work in the field for the alternation of various subjects in the successive of electricity; the L. la Caze prize (10,000 francs), awarded issues, the volume for this year contains, in addition to the in one sum for works important in physics. astronomical data, tables regarding statistics, geography, Chemistry.—The Jecker prize (10,000 francs), for a ork &c., to the exclusion of data for chemistry and physics. in organic chemistry; the Cahours prize (3000 francsi, for
The astronomical section contains, among many other the encouragement of young chemists; the Montyon prise. things, the following useful information :-- table for unhealthy trades (2500 francs and a mention of 1500 francs), calculating the altitude from readings of the barometer, a
means of rendering a trade less unhealthy cr complete table of the elements of variable stars of known dangerous; the L. la Caze prize (10,000 francs), for the periods, tables of stellar parallaxes, double stars and proper best work on chemistry during the last two years; thir mctions, and article of stellar spectroscopy by M. Bordin prize (3000 francs). for a memoir on the silicides Gramont, whilst the sun-dial, solar physics, the table of and the part played by them in metallic alloys. niinor planets, &c., are reserved for the issue of 1900.
Mineralogy and Geology.–The Delesse prize (140
weathered masses known as La Ciudad de Rocas (“. The City of Rocks "'). The outlines of the rocks are domed and rounded, and they appear to be due to the weathering of fairly homogeneous rhyolitic materials.
Particular attention is directed by the author to the famous Cerro Mercado or Iron Mountain, a hill largely made up of solid iron-ore, and situated less than a mile north-east of Durango City. It rises abruptly from the alluvial plain to an average height of about 300 feet, with single peaks 50 feet to 100 feet higher. The length of the hill is about if miles, and its average width about onethird of a mile. The ore appears to be chiefly hæmatite, although some magnetite also occurs; in physical characters it varies, being hard and soft, black, red, specular, and earthy. Hard, solid black ore, however, forms the chief mass of the mountain," the black colour being in striking contrast to the yellow and green of the surrounding plain. The ridge is almost bare of vegetation, except for straggling cacti, and its outline is bold and rugged. Steep cliffs 10 feet to 20 feet high are not infrequent, and in places they exhibit a distinct columnar structure like that of basalt (see Fig. 1). The existence of this hill appears to have been made known in 1552 A.D., but the first serious attempt to work the iron
francs), for a work concerning geology, or, failing that, mineralogy; the Fontannes prize (2000 francs), for the best publication on paläontology; the Alhumbert prize (1000 francs), for a memoir on the period of the last volcanic eruptions in France.
Botany.—The grand prize of the physical sciences (3000 francs); the question proposed is the demonstration of the various modes of formation and development of the egg in the Ascomycetes and the Basidiomycetes. The Desmazières prize (1000 francs), for the best work published during the preceding year on Cryptogams; the Montagne prize (1500 francs), for work having for its object the anatomy, physiology, development, or the description of the lower Cryptogams; the Thore prize (200 francs), for work on the cellular Cryptogams of Europe.
Inatomy and Zoology.—The Savigny prize (1300 francs), for the assistance of young travelling zoologists, not receiving Government assistance, who have especially occupied themselves with the invertebrates of Egypt and Syria.
Medicine and Surgery.-A Montyon prize (2500 francs and a mention of 1500 francs), for works and discoveries useful in the art of healing ; the Barbier prize (2000 francs), for a valuable discovery in surgical, medical, or pharmaceutical science, or in botany having relation with medicine; the Bréant prize (100,000 francs), for the discovery of an absolute specific against Asiatic cholera, or to point out in an irrefutable manner the causes of Asiatic cholera, so that the suppression of the disease will follow. Failing the award of the capital sum, the annual interest will be given for a
ca rigorous demonstration of the existence in the atmosphere of matter capable of playing a part in the production or propagation of epidemic diseases. The Godard prize (1000 francs), for the best memoir on the anatomy, physiology, and pathology of the genito-urinary organs; the Baron Larrey prize (750 francs), for the best work dealing with the subject of military medicine, surgery, or hygiene; the Bellion prize (1400 francs); the Mège prize (10,000 francs); the Serres prize (7500 francs), for a memoiron general embryology applied as far as possible to physiology and medicine; the Dusgate prize (2500 francs), for the best work on the diagnosis of death and the prevention of premature burial.
Physiology.-A Montyon prize (750 francs), and the Philipeaux prize (900 francs), for work in experimental physiology ; the Lallemand prize (1800 francs), for work on the nervous system; the Pourat prize (1000 francs), for an essay on the origin of muscular glycogen.
Statistics.-A Montyon prize (500 francs), for a memoir en French statistics.
Among the general prizes offered in 1905 are the following :-the Binoux prize (2000 francs), for a work on the history of science; the Trémont prize (1100 francs), the Gegner prize (3800 francs), the Lannelongue prize (1200 francs), the Wilde prize (4000 francs), the Saintour prize (3000 francs). the Petit d'Ormoy prizes (two of 10,000 francs), all for work useful in the promotion of scientific knowledge. Of these prizes those bear ng the names of Pierre Guzman, Lalande, Tchihatchef, La Caze, Delesse, and Desmazières are especially mentioned as being awarded without distinction of nationality.
GEOLOGICAL NOTES. VERY little geological information appears to have been
published on the State of Durango, in western Mexico. The observations therefore recorded during a brief journey by Dr. O. C. Farrington are of considerable interest (Field Columbian Museum, No. 89, geological series, vol. ii.,
His route extended from the city of Durango, which is situated upon an alluvial plain hemmed in by low and rugged hills, to the silver-mining town of Villa Corona or Ventanas, distant about seventy miles in a direct line. The ground, which forms part of the interior plateau of Mexico, rises from about 6000 feet at Durango to 9000 feet. While large tracts of the area are semi-arid and sparsely rovered with soil and vegetation, in some places corn is successfully grown, and elsewhere there occur extensive pine forests with caks. Views of the scenery are given. Eruptive rocks prevail, and near the Ciudad ranch, on one of the highest parts of the plateau, there is a tract of
was made in 1828. Successful operations were conducted until 1888, and only within the last five years has a steady production been maintained. The amount of ore exposed above the level of the plain is estimated at 360 million tons. The author briefly discusses the origin of the iron-ore, regarding it as probably igneous. The associated rocks of the district are rhyolites, probably of later Tertiary age, but the relation, either in time or manner of origin, between the associated eruptive rock and the iron-oxide, and the origin of the iron-oxide itself, seem as yet difficult to determine.
A geological description of the Baraboo iron-bearing district of Wisconsin, by Dr. Samuel Weidman, has been issued by the Wisconsin Geological and Natural History Survey (Bulletin No. 13, economic series No. 8). The area is formed mainly by pre-Cambrian quartzites, which stand out in bold north and south ranges, so connected both on the east and west as to constitute a cordon of bluffs enclosing a depressed drift-covered interior. Isolated areas of still older rocks, rhyolite, granite, and diorite, occur along the outer borders of the ranges. Potsdam sandstone is found beneath the drift, and on the slopes of the Baraboo quartzites, while later Palæozoic strata are met with at higher levels. Special interest has recently been aroused by
the discovery of large deposits of iron-ore beneath the drift- Part ii. of the seventh volume of the Transactions of the covered valley, a discovery made while digging or drilling Geological Society of South Africa (Johannesburg, 1904) the farm wells in this otherwise well settled agricultural bears witness to the prevalence of research in Africa in all district. The iron-bearing rocks, termed the Freedom branches of geology. Dr. Hatch contributes two papers, formation, from the town of North Freedom, comprise one in conjunction with Prof. Corstorphine, who has been slate, chert, dolomite, and iron-ore, and all gradational drawn off from the service of Cape Colony into a more phases between these kinds of rock, including banded ferru- adventurous field. Mr. J. P. Johnson shows that two types ginous chert like that in the iron-bearing series of Lake of stone implements are found in the Taaibosch Spruit, the Superior. The author points out that the Baraboo pre- older and rougher lying beneath 15 feet of alluvium, and Cambrian series may be compared with the upper portion of the newer type upon the surface. Mr. F. W. Voit furnishes the Lower Marquette series, the Freedom formation corre- a paper of general interest on the geology of German Southsponding with the Negaunee iron-bearing formation. De- West Africa, in which a large series of ancient metamorphic tailed accounts are given of the various rocks and drift rocks is dealt with; these are accompanied by intrusions of deposits, and of the circulation of underground water. granite. The author urges that some of what might be
The recent numbers of the Boletin del Cuerpo de regarded as ordinary contact-phenomena are here carried Ingenieros de Minas del Peru, issued during 1904, continue out on a regional scale, and must be referred to the action to testify to the energy and activity of the Government of pressure rather than to the invasion of the granite. The officers charged with the development of Peru. No. 8, by metamorphic rocks are impregnated with important de Señor Venturo, describes important deposits of hæmatite posits of copper-ore, sometimes localised in quartz veins, in the extreme north of the country, the ore appearing on and sometimes spread in cloud-like masses through the the surface, and being probably derived from the dehydration schists. of an old lake-iron deposit. Fragments of rocks from the In the first part of the Jahrbuch der k.k. geologischen margins of the former lake are found surrounded by the Reichsanstalt for 1904 (September 15), Franz Toula de iron oxide, and the iron itself seems to have been dissolved scribes the results of his journey to the Dobrudscha in 1892, out from the acid igneous masses in the neighbourhood. and discusses in particular the forms of Exogyra met with.
In view of the demand for nickel for plating, for alloy- Dr. Petrascheck, in examining the granitic mass ing steel, and for coinage, Señor Eduardo de Habich was Brixen, in the Adige valley, reviews the nature of Seder. sent to report on the nickeliferous veins of the province of holm's “Myrmekite,” an intergrowth of triclinic selspar La Mar, which present practically a virgin field. His and quartz, and concludes that it is primary product of memoir (No. 1) seems encouraging, the chief ores being
the consolidation of the igneous magma. Dr. Ampferer's ullmannite and 'nickeline (kupfernickel), occurring mostly important examination of the terraces along the valley of in veins of quartz, which may also contain both gold and the Inn (pp. 91-160) should be considered by all who seek silver. No.
has probably the widest interest for to explain the topography of glaciated areas. The author geologists in general, giving as it does the results of a visit finds that the terraces of gravel rest on an earlier series to central Peru by Dr. Gustav Steinmann, of Freiburg-im- of terraces cut in the rock, which are at very different levels Breisgau, early in 1904. Señor Elmore is the author of on opposite walls of the valley. He summarises his results Boletin No. 13, on the water-supply of the Rimac valley. in a series of fifty-six propositions, among them being the It is shown that the permeable subsoil in the valley-floor, conclusion that the Inn valley, on the retreat of the ice, from Chosica downwards, becomes charged with a good exhibited a succession of shallow basin-like excavations, potable water by infiltration from the River Rimac, and this
which were filled in later by a continuous deposit of is capable of furnishing a healthy supply wherever it may
alluvium. These hollows, like the smaller details of the be desirable to tap it. The marked rise of this underground
ice-erosion, were formed independently of the hardness of water in Callao is interestingly attributed to the obstacle
the rocks concerned, and Dr. Ampferer believes that the furnished by the neighbouring island of San Lorenzo. The
variation in the activity of a glacier as an abrading agent economic aspect of Señor Elmore's report is sure to be
depends in reality on variations in the local pressure and widely welcomed in a populous and practically rainless
velocity. With reduced pressure and greater velocity the district.
same amount of erosion can be performed as with greater The fourteenth volume of the Berichte der natur
pressure and less velocity. The author opposes the view forschenden Gesellschaft zu Freiburg-im-Breisgau (1904)
that rock-obstacles on the walls of a valley are inevitably contains several papers of geological interest. A. Freiherr
worn away by the passage of glacier-ice; he urges, on the von Bistram's studies on the dolomitic region of the Alps
other hand, that such irregularities may be left standing of Lugano were commented on when they first appeared in
out, while others are actually produced by the lack of separate form (NATURE, vol. Ixix. p. 112). Walther Schiller
uniformity in the forces of erosion, to which he specially and W. Paulcke are both concerned with the structure of
directs attention. the Engadine, the former giving a detailed account of the
The Verhandlungen der k.k. geologischen Reichsanstalt, region south-east of Schuls, of which the Piz Lischanna
Nos. 9-12, for 1904, continue to be rich in papers op forms the centre, while the latter examines the structure of
Bohemia and Moravia, and students of petrology in the a wider area, from Landeck to the basin of the Po.
broad sense, as well as of Palæozoic and Mesozoic faunas, Palæontological papers seldom contain so much personal
must endeavour to keep pace with the monthly observations revelation as is to be found in Herr Georg Boehm's first
furnished by Dr. Katzer, Jaroslav J. Jahn, Friedrich section of his Beiträge zur Geologie von Niederländisch
Trauth, and others. The Dalmatian islands also receive Indien (Palaeontographica, supplement iv., Stuttgart, 1904).
attention in Dr. Waagen's reports of his recent journers. The splendid series of ammonites therein described, probably from a Tithonian horizon, were obtained for the most part from the collection of a postmaster of Sula Besi, and from one of “die Alfuren, the latter name being
AGRICULTURAL EDUCATION AND
RESEARCH. applied to any uncivilised natives. Some specimens were even extracted from concealment in the scanty clothing of the boatmen. The postmaster and his allies appear, con- made the University of Wisconsin familiar to English sciously or unconsciously, to have lost touch with the true agricultural students, so that considerable interest attaches locality of their finds, and to have opened up a delusive route
to the twentieth annual report of the experiment station, through the forest in Taliabu, whereby Herr Boehm was which contains a short history of the College of Agriculture, led to a spot where he found abundant belemnites and and summarises the results of twenty years' research. The Nuculæ, but none of the highly prized ammonites. The
college is one of the best known in the United States, and " Alfuren-Sammlung " proves to be of unusual interest, and its record is typical of many similar institutions. A promay perhaps grow in the course of time, if judicious sums fessor of agriculture was appointed in 1866, there was the are expended on the “ uncivilised " population. The in- usual attempt to teach before the materials for a course of clusion of fossils smuggled in from other places is now, university grade existed, and there was the usual failure. however, a possibility against which it will be difficult to Then, when the indignation and forcible action of some guard.
thirty representative farmers " led the regents of the uni