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of goool., an income which is derived from a variety of

THE BEN BULBEN DISTRICT. sources :-Treasury grant, 4000l.; Gassiot Fund, 400l. (about); from Meteorological Committee, 400l. ; fees, &c.; THE region lying north of Sligo, which was visited by 42001. (about). In addition to this there has been 12001. a large party of naturalists last July on the occasion in donations.

of the fourth triennial conference of the Naturalists' Field Whether the laboratory can become self-supporting is a Clubs of Ireland, is one of much beauty and interest. In matter of doubt to my mind. Even if it should be so, that its general aspect it recalls the best features of the Yorkis no reason for taking it away from State control, which shire Carboniferous Limestone area. Its setting, with the always gives an impress to decisions, and it is a pledge that great limestone plain of Ireland stretching away on one gain is not its only object. Certainly it would never arrive hand, and the Atlantic Ocean on another, adds a dignity at the proportions that the huge, more than self-supporting and impressiveness to this group of cliff-rimmed, Alat-topped department, the Post Office, has arrived at. The example hills which might not be bestowed by their height alone, of Germany, where the State takes the fees, and supports though they are of no mean elevation (Truskmore, the the institution, is worth following.

highest point, rises to 2113 feet). The Ben Bulben range,

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1 The annual grant was made before the work was started, and any balance left after paying salaries I believe was available for apparatus. • In these cases the State takes the fees.

3 For the first year.

4 Includes the Observatory Department.

I might refer to researches in solar physics also, which are carried out in the iron shanties at South Kensington, "izder the control of the Board of Education. The sum of zool. is allotted as a grant in aid for the work that is carried out there, and some of the staff are borne on the estimates; but if, as is to be believed, some of the tremendous problems of the causes of famine and plenty are dependent on the solar phenomena, then this work should be enlarged and encouraged. The expenditure of ten times the sum in one year may enable millions of pounds and lives to be saved which may be lost from the scant supply of needful means. It is true that the Solar Physics Observatory is under the Board of Education, but if its history were written, I doubt not that it would be found that from its very first inception (due to the repeated recommendation of a host of scientific men who foresaw something of what might be expected from it) the State wanted none of it. It may be said that if the Meteorological Office and the National Physical Laboratory were attached to a Government department, they might be starved in the same way. I do not believe it possible that such would be the case, for these two are of ostensible use to the ordinary public, and appeal to that most sagacious and popular person the man in the street, in a way that solar physics does not. The last deals with problems which are for future use, but it is intimately, most intimately, connected with meteorology. If the Meteorological Office becomes attached, as it eventually must be, to a Government department, the Solar Physics Observatory and staff should be attached to the same department.

If the Government will recognise the two institutions as doing essentially public service, and ask for the necessary funds, I believe Parliament would vote the supplies in the same ungrudging manner that Congress has done, as they would look upon them as a paying investment. Parliament realises most frequently before Government does the importance of any public work. The most happy solution of the problem would be (1) to have some department of State to which these and other kindred scientific institutions should be attached ; (2) to have a scientific advisory board ; (3) to distinguish clearly between grants for research, equipment, and material, and those for staff.

which derives its name from that of one of its spurs which projects boldly towards the Atlantic, represents the wreck of the Upper Limestone of this district. The fertile undulating low grounds all around are occupied by a lower and more argillaceous series, through which one of the old Caledonian folds of Ireland projects as a knobby ridge, its rugged outlines forming a charming contrast with the green and grey tabular forms of the limestone.

The Upper Limestone, 700 feet or 800 feet thick, massive and strongly jointed vertically, rests on the lower series as a cliff-bound plateau, intersected by several grand glens, which are cut through the limestone deep into the less resisting rocks underneath. The mural precipices are the result of the characteristic weathering of the massive limestones. Below them, where not obscured by talus, the Middle Limestones and shales fall away in steep concave slopes into the plain. The exquisite valleys of Glencar and Glenade cut right through the plateau, the first in an east and west direction, the other north and south. Each is from one to two miles wide from cliff-top to cliff-top, and about a thousand feet deep (Fig. 1). The floors of these valleys are undulating, and the scenery is much enhanced by the fact that each embosoms a lake at the point where the cliff scenery reaches its best.

On some parts of the plateau-edge denudation has been more severe, as in the beautiful wedge of Ben Whiskin (1666 feet), the western side of which displays a characteristic precipitous front, while the eastern side has been worn down to a uniform steep slope which drops into Gleniff.

The uniformity of the post-Carboniferous uplift is shown by the almost absolute horizontality of the beds of limestone throughout the region. The surface of the plateau, while retaining in a general way this horizontality, is seen on a nearer approach to be undulating, a feature chiefly due to the fact that patches of the Yoredale sandstone still remain here and there isolated on the surface of the limestone. The whole plateau, limestone as well as sandstone, has in general a thick covering of peat.

To the botanist the Ben Bulben range is well known as the only British habitat of Arenaria ciliata, a species with a high northern and alpine distribution, which is locally

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Fig. 1.-Entrance of Glencar. Showing the southern cliff-wall of Carboniferous Limestone, which rises a thousand feet above the valley.

to the British Isles, which accompanied it here, is likewise coast and the protective works put up to stop the erosion northern; and other instances might be quoted. Among at Hornsea, Withernsea, and Spurn were dealt with in a other results of the Field Club visit (which are fully de- paper by Mr. Pickwell on the encroachments of the sea scribed in the September number of the Irish Naturalist) from Spurn Point to Flamborough Head printed in the may be mentioned the discovery of three water-mites, one Minutes of Proceedings of the Institution of Civil Engineers, of which, Eylais bicornuta, is new to science, and the two vol. li., 1878. others new to Britain.

The whole subject, both as descriptive of the coast of England, the losses that have taken place, and the works

that have been carried out to prevent erosion, is also very COAST EROSION AND PROTECTION. fully dealt with in the work on “ The Sea Coast

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lished by Messrs. Longmans in 1902. TWO papers on this subject were recently read at the Mr. Matthews in his paper makes a statement that has

Institution of Civil Engineers, one by Mr. A. E. frequently been made before, but for which there does not Carey on coast erosion, and the other by Mr. E. R. appear to be any warrant, to the effect that the material Matthews, the borough engineer of Bridlington, on the eroded from the Holderness coast is carried into the estuary erosion of the Holderness coast of Yorkshire.

of the Humber. This subject was very fully dealt with in The first paper deals generally with the whole coast of a paper read at the British Association at Glasgow in 1901 England, and briefly enumerates the salient geological on the source of warp in the Humber, in which it was confeatures of the coast' line and points out their connection clusively shown that it is physically impossible for this with the relative rates of erosion. The second paper is con- material to be carried into the Humber, and that, as a

matter of fact, no warp is carried into the river from the the sea shore either by increasing the powers of the Board sea, but that the warp in suspension is derived entirely from of Trade or by the appointment of a special commission, as the solid matter brought down by the various tributaries suggested by the author of the paper. The great difficulty of the river. The paper describes this matter as oscillating will be in dealing with the rights of the persons claiming the backwards and forwards with the tides in a zone confined ownership of the beach material, which in many cases is to the lower reaches of the Ouse and the Trent, except that sold and removed in very large quantities for concrete when heavy freshets are running it extends into the Humber making, road repairs, or other purposes. The Board of and is then partly carried out to sea. This peculiar action Trade occasionally, on being applied to, intervenes and is made use of to improve the value of the land adjacent to issues notices prohibiting the removal of sand and shingle, the rivers by the process of “ warping.' Any solid matter but its power to do so is not so well defined as it ought to brought into the Humber on the food tide consists entirely be, and the whole subject requires investigation, and legisof clean sand, and has no relation to the waste of the Holder- lative action for regulating and controlling works carried ness coast.

out on the sea shore and the removal of beach material ; The only novel features, therefore, in these papers is the but the preservation of the property of landowners and urban suggestion of Mr. Carey that the matter should be taken authorities out of funds provided from the national exchequer up by Parliament, and that a body of commissioners should would be entirely contrary to the methods of administration be created with the special function of dealing with the hitherto pursued in this country. foreshores of England and Wales. He proposes that the coast should be divided into districts placed under commissioners, each having an engineer to act as coast warden, with power to deal with the material on the beach, and the THE NOVEMBER METEORS OF 1904. general control and management of all foreshore lands, the costs incurred by this commission to be divided between THOUGH there was no prospect of a brilliant display the Treasury, the local authorities, and the landowners.

this year, there seemed the probability of a pretty conMr. Matthews confines his ideas of Government inter

spicuous shower. In 1838-five years after the great ference to the coast of Yorkshire, and suggests that this

meteor-storm of 1833–Mr. Woods, of London, reported in ought to be protected against the inroads of the sea by the

the Times that on the night of November 12, between Government, quoting as a precedent for this that the Board 15h. 25m. and 15h. 55m., “ nothing could exceed the ut Trade protects the Spurn Peninsula. He loses sight, grandeur of the heavens. Meteors fell like a shower of however, of the fact that this is done for the protection of

bombshells in a bombardment and in such rapid succession the lighthouses which stand on the peninsula, and for the as to defy every attempt to watch their particular directions preservation of the entrance to the Humber. Mr. Matthews

or to ascertain their numbers. Mr. Woods estimated gives an estimate for protecting this reach of coast by sea that he saw 400 or 500 meteors during the half-hour walls and groynes, and shows, as has been done by others mentioned. on previous occasions, that the value of the land swallowed In 1872 also, about five years after the brilliant displays up by the sea within a reasonable period would not amount

in 1866, 1867, and 1868, the Leonids returned pretty to one-third of the first cost of the protective works, apart

abundantly, for on November 13, 12h. to 18h., several from their maintenance.

observers at Matera, Italy, counted 638 meteors, and the It will be remembered that recently, owing to the great de

display was regarded as having been much brighter than struction of sea protective works that occurred at Lowestoft usual. and Southwold, the representatives of the sea coast towns In these circumstances it was expected that the return on the east of England held a conference at Norwich and of 1904 would be deserving of careful observation, and so appointed delegates to interview the Prime Minister it has proved, though the shower was perhaps not quite so and the officials of the Government departments more par

rich as expected. The earth, however, probably passed ricularly concerned in this matter, urging that the pre- through the denser part of the stream at about Greenwich servation of the coast and the sea defence works ought to noon on November 15, and thus it must have escaped observbe a national charge. So far, however, they do not appear

ation in England. Reports from American stations are to have justified their claims for such aid. It has been awaited with interest. In this country fogs were very prepointed out that most of these towns have gradually valent at the important time, and at some places appear to emerged from mere fishing villages into sea-side resorts, and have obliterated the phenomenon. have erected promenades and other similar works for the At Bristol during the night of November 13 there were purpose of making their places popular, and have by this very few meteors visible, with only occasional Leonids, but means increased the value of the land in the neighbourhood the stars were dim in the fog. from a mere agricultural price to that of building land, very On November 14 the conditions were more favourable. greatly to the profit of the owners of such land. It appears Between 13h. 3om. and 15h. 45m. about 55 meteors were therefore manifestly unfair to ask the owners of the agri- seen (including 33 Leonids) by the writer during a watch cultural land at the back, whose rents have already been extending over jh. of the period named. It was considered greatly depleted by the fall in value of agricultural produce that Leonids were appearing at the horary rate of 25 for during the last few years, to contribute towards works for one observer. After 16h. increasing fog interfered with the improvement of their neighbours' land on the coast, observation. The Rev. S. J. Johnson at Bridport had, howwhich they would have to do if these works were made a ever, a very clear sky after 16h., and noted a fairly numerous charge on the national revenue, and it would be equally display of Leonids, including one as brillianť as Venus and unjust to levy contributions on inland towns which have several equal to Jupiter. He does not mention the exact Borne the costs of large improvements for sanitary and number seen. health purposes out of their own rates.

Mr. C. L. Brook at Meltham, near Huddersfield, watched Mr. Carey describes in his paper the evolution of a on November 14 between 16h. and 18h., and counted 69 Pa-side village, subject to intermittent inundation, into a Leonids, of which number 17 were observed in the first watering place, in front of which the local authority charged quarter of an hour. Other results have come to hand which with the works not only encloses within the sea wall nearly corroborate Mr. Brook's figures, and show that the the whole of the shingle beach which afforded a natural maximum was attained between 15h. 5om. and 16h. 2om., protection to the shore, but also by groynes traps the whole when the rate of apparition was i Leonid per minute in the tof the travelling shingle, with disastrous results to the sphere of vision commanded by one observer. owner of the land to leeward. It may also be pointed out, There appear to have been very few Leonids seen either as stated in the British Association report for 1895, that on the nights of November 13 or 15. many of the disasters that occur to the sea walls and As observed at Bristol, the radiant seemed to be an area promenades of these sea-side towns are due to defective 4 or 5 degrees in diameter, with its centre slightly west engineering and a complete disregard of the laws of of u and į Leonis, or at 151° +23°. There were several nature.

minor showers visible, and two of these were well proIt is obvious that it would be very desirable to set up nounced at 43° +21° and 144° +37o. wme better control over the works now carried on along

W. F. DENNING,

-94

UNIVERSITY AND EDUCATIONAL

ledge of the United Kingdom and of other parts of the
INTELLIGENCE.

Empire, a syllabus of seven lectures on the United Kingdom,

each to be illustrated by about forty lantern slides, has been
OXFORD.-The Rhodes trustees have decided to add 200l.

drawn up by a committee connected with the Colonial Office.
a year for the next five years to the stipend of the reader The subjects of the lectures are :-(1) the journey from the
in pathology: Mr. Alfred Beit and Mr. Wernher have East to London ; (2) London the Imperial city ; (3) scenery
supplied sufficient money to endow a professorship of of the United Kingdom ; (4) historic centres and their in-
colonial history, and to appoint an assistant professor in fluence on national life; (5) country life and the smaller
the same subject. They have also made a gift to the towns; (6) great towns, the industries, and commerce;
Bodleian Library.

(7) defences of the Empire. Mr. H. J. Mackinder will give
Magdalen College has made a grant to the delegates of

an account of the scheme, and exhibit some of the slides
the university museum of 250l. a year for the next two

which have been prepared to illustrate it, at the Whitehall
years for the purpose of the payment of scientific assistants.

Rooms, Hôtel Métropole, on Wednesday, December 7, at
The following examiners have been appointed :-in 5 p.m. The Colonial Secretary has consented to preside.
chemistry, W. H. Perkin, jun. ; in preliminary physics,

At the inaugural meeting of the new session of the Royal
E. S. Craig; in preliminary chemistry, J. E. Marsh; in Statistical Society on November 15, the new president, Sir
preliminary animal physiology, W. Ramsden; in pre- Francis Sharp Powell, Bart., M.P., delivered an address on
liminary zoology, E. S. Goodrich ; in medicine, organic education in which he presented specially impressive figures
chemistry, N. V. Sidgwick; in human anatomy, A. Thom-

to illustrate prominent educational features of various coun-
son; in materia medica, R. Stockman; in midwifery, J. S. tries. The activity in educational matters of to-day was
Fairbairn; in pathology, G. Sims-Woodhead; in forensiccommended, and attention directed to the growing convic.
medicine and public health, J. D. Mann and A. L. Ormerod ; tion that a more liberal education than that provided by
and in human physiology, L. E. Hill.

purely technical instruction is necessary in this country.

Among other interesting comparisons instituted in the
The Treasury, at the instance of the Colonial Office, has address was one dealing with the average expenditure on
made a grant of sool. a year to the Liverpool School of education per child in Prussia and in England. Exclusive
Tropical Medicine.

of central and local administration, it appears that the

average expenditure per child on the register is in Prussia
The prizes and certificates gained by students at the

il. 155. 60. if buildings are included, and il. ros. 8d. ex-
Sir John Cass Technical Institute during the past session clusive of buildings. The corresponding figures in England
will be distributed by Sir William H. White, K.C.B.,

are al. 125. 9d. and il. 175. Further, the number of scholars
F.R.S., on Thursday, December 1. The laboratories and

per teacher is 66 in Prussia and 57 England, excluding
workshops of the institute will be on view, and there will pupil teachers. It seems clear from these figures that
be exhibitions of students' work.

Germany, with a smaller expenditure per child than our
At Bedford College for Women two occasional lectures,

own, succeeds in securing better results, and it is to be
open to the public without fee, will be delivered on hoped that English education soon may be conducted more
November 25 and December 8. The first lecture will be by scientifically, so that the value of our education may be
Prof. Karl Pearson, F.R.S., on “ Recent Work and some

more in accordance with our expenditure. The address also
Unsolved Problems in Heredity," and the second by Miss

pointed out that in secondary education German activity is
C. A. Raisin on “ London, its Early Foundation and Later

shown in the provision of technical schools for special
Growth, a Geological Study.”

branches of metal industries, for wood-working, engineer-

ing, and textile industries, and for agriculture.
The alumni of the Massachusetts Institute of Technology
are collecting, says Science, a fund for current expenses,
which now amounts to more than 20,000l., to be used in the

SOCIETIES AND ACADEMIES.
course of the next five years. We learn from the same
source that Harvard University has received from Miss

LONDON.
Whitney a gift of 1000l., the income of which is to be Royal Society, June 16.—“ Hydrolysis of Cane Sugar
applied as a scholarship to aid meritorious students in the byd- and l-Camphor-B-Sulphonic Acids." By R. J.
study of field geology or geography in the summer months, Caldwell, B.Sc.
preferably in the mountain region of the western United The rates of inversion of cane sugar by two stereoisomeric
States.

acids were determined in order to compare the results with
APPLICATION will be made to Parliament in the ensuing

the case of inversion by enzymes, which are apparently all
session for an Act to transfer University College, London,

asymmetric substances. Wilhelmj's law holds accurately
exclusive of the North London or University College for half normal solutions of both dextro- and lævo-camphor-
Hospital, the medical school, and the boys' school, to the

B-sulphonic acids. The velocity constant (equal to
University of London, and to dissolve or provide for the

10*/i logi, a/a- *, where a is the initial cane sugar concen-
dissolution of the college itself. The Bill will contain a

tration, and x the concentration of the inverted sugar at

the end of t minutes) was found to be 10-07 and 10-13 in
clause authorising and providing for the making by the
Senate of the university, or by such other body or persons

two experiments with the dextro-acid, and 10.05 and 10-05
as the Act may prescribe, of statutes and regulations for the

for the lævo-acid. The author concludes that there is no

difference in the inverting power of the two acids attribu-
management of the college; and provision will also be made
for carrying on the work of the hospital, the medical school,

table to their asymmetric structure. This result is in accord

with the conclusion arrived at by Emil Fischer regarding
and the boys' school.

the d- and l-camphoric acids (Zeits. Physiol. Chem., 1898.
The new buildings of the Borough Polytechnic Institute vol. xxvi. p. 83). The relative activities of hydrochloric acid
were opened by Mr. Benn, chairman of the London County and camphor-B-sulphonic acid towards cane sugar are
Council, on November 16. The buildings, which were 100 : 90, whereas for milk sugar the ratio is 100 : 70.
urgently needed for the large number of students, have cost

November 17.-“ Enhanced Lines of Titanium, Iron,
with equipment more than 24,00ol. Toward this amount

and Chromium in the Fraunhoferic Spectrum." Ву
the central governing body of the City of London Parochial

Sir J. Norman Lockyer, K.C.B., LL.D., F.R.S., and F. E.
Charities contributed 3000l., the London County Council

Baxandall, A.R.C.S.
16,000l., with a promise of a further sum. The council

In this paper the authors give the results of a detailed
also meets the cost of installation of the electric light and

study of the enhanced lines of Ti, Fe, and Cr in relation to
equipment, amounting to 29501. The total cost of the land,
about it acres, buildings and equipment, by the end of the Kensington publications it had been shown that the enhanced

the lines of the Fraunhoferic spectrum. In previous
year will be not less than 96,00ol.

lines of some of the metals are prominent in the spectra of
With the object of giving to the school children of the a Cygni and the sun's chromosphere, whilst it has been
United Kingdom better knowledge of the colonies, and of generally recognised that the lines in the Fraunhoferic spec-
giving to tħe school children of each colony better know- į trum are mainly the equivalents of lines in the arc spectra
of metals. In connection with the work on enhanced lines, the efficiency in this manner involves the determination of it has been noted that some of them, at least, appear to the mean spherical candle-power (M.S.C.P.), and the paper correspond with comparatively weak solar lines to which describes a method of doing this.' The objects of the paper Rowland has attached no origin. With the object of are :-(1) to obtain curves showing the variations of candlepossibly tracing some of the unorigined solar lines to their power of glow-lamps in a horizontal plane; (2) to obtain source, a careful comparison has been made between the reduction factors by which the mean horizontal andleenhanced lines shown in the photographic spark spectra of power (M.H.C.P.) may be calculated from the maximum Ti, Fe, and Cr and the solar lines. The photographs used horizontal candle-power (C.P.); and (3) to obtain reduction for this purpose were all taken with a Rowland grating, and factors for deducing the M.S.C.P. from the M.H.C.P. and on such a scale that the length of spectrum between K from the C.P.-Exhibition of apparatus : R. W. Paul. The and F is about 14 inches (35 cm.). The chemical elements construction of highly sensitive pivoted electrical instrunamed were first selected for investigation because they ments has been rendered difficult by the fact that delicate furnish by far the greater number of enhanced lines which pivots will not admit of transporting without injury. A have been shown to occur in the spectrum of a Cygni.

number of galvanometers were shown in which the design It was found that many of the enhanced lines fell exactly was based upon the use of a moving coil, supported on one on isolated lines of the solar spectrum, and in these cases pivot in a powerful and uniform magnetic field, and conthe solar wave-lengths were adopted and the identification trolled by a spring. A simple non-reflecting, suspended-coil considered established. If, however, for any of these solar galvanometer for the student's use, with a sensibility of lines Rowland had given alternative origins, special com- I division per micro-ampere, was also exhibited. A new parisons were made of the enhanced line photograph with design of lantern, adapted for science lectures, and for use those of the metals given by Rowland. Notes (given at with three Nernst filaments arranged closely together, was the end of the tables) were made as to the agreement or shown in action. It is capable of being instantly changed non-agreement of the metallic lines involved, and also of from horizontal to vertical projection, can be fitted with a the relative intensities in their individual spectra, so that reversing prism, and has a wide adjustment for focusing. due weights could be given to the respective metallic lines Another exhibit was an Ayrton Mather reflecting electrowhich were thought conjointly to produce compound solar static voltmeter with a magnetic damping device. The lines.

instrument shown had a sensibility of 500 mm. at 1 m. foi Where there was any doubt as to the exact coincidence 30 volts, but similar instruments are made to give this of a metallic and solar line, or where by the close grouping deflection with pressures as low as 8 volts. of several solar lines it was not possible to say by direct comparison to which solar line the metallic line corre

Paris. sponded, careful measures were made of the metallic line, Academy of Sciences, November 14.-M. Mascart in the and its wave-length found by interpolation between closely

chair.-Researches on the desiccation of plants : the period adjacent lines of known wave-length. The resulting wave- of vitality. Moistening by liquid water : imperfect reversilengths were then compared with Rowland's solar wave- bility : M. Berthelot.-New researches on the Cañon lengths, and in cases of close agreement with solar lines it Diablo meteorite : Henri Moissan. A very careful and was deemed probable that the two lines were really identical. complete examination was made of a block of this meteorite.

A final table is given of the enhanced lines of the three weighing 183 kilograms. It was found to be distinctly elements which are considered, as a result of the analysis, heterogeneous in structure, containing iron, nickel, sulphur, to be identical with lines in the Fraunhoferic spectrum. | phosphorus, silicon, and carbon. The latter element was Forty-two of these agree with solar lines unorigined by present in several forms : amorphous carbon, graphite, and Rowland, and as the majority of them are conspicuous diamonds, both the black and transparent variety of the lines in stellar spectra of certain types, it has been thought diamond being separated. Characteristic green hexagonal. that these results will be of importance in standardising crystals of silicon carbide were also isolated, the author rethe wave-lengths of many stellar lines.

marking that this is the first time that this compound has

been met with in nature.—The measurements of the velocity Physical Society, November 11.-Dr. R. T. Glazebrook, of propagation of earthquakes : G. Lippmann. An instruF.R.S., president, in the chair.-Investigation of the varia- ment is described capable of determining to 1/5 of a second tions of magnetic hysteresis with frequency : Prof. T. R. the exact time of the commencement of a seismic shock at Lyle. The experiments were made on twoʻrings of lamin- any given point. The author also discusses the following ated annealed iron, in one of which the radial breadth of problem : to find the direction of the seismic wave front at the iron was considerable relative to its mean radius. the surface of the earth, in a given region, and to measure These rings were magnetised by alternating currents of the velocity of its horizontal propagation.-On the inscripdifferent strengths and periods; both the magnetising- tion of seismic movements : G. Lippmann. In the photorurrent wave and the magnetic-flux wave were quantitatively graphic self-recording apparatus in common use for earthdetermined by a wave-tracer (described by the author in quake phenomena, owing to the considerable expense of the the Phil. Mag., November, 1903), and the wave-forms so strip of sensitised paper, its velocity through the apparatus obtained subjected to harmonic analysis. The experiments is very slow, about 12 cm, per hour. In the modification were divided into series, in which the period and wave-form now proposed, the slit through which the ray of light falls of the magnetising current were kept as nearly constant on the paper is closed by a shutter, and this is operated as possible throughout any one series, while its strength electrically by the seismic shock. By this means the speed was varied. The analytic expressions for the associated may be greatly increased, since the paper is only used up rurrent and flux waves for a few series are given in tabular during the period of the earthquake shocks.--On the seeds furm. From the analytic expressions for each pair of of the Neuropterideæ : M. Grand'Eury. As the result of Associated waves it was found that when the magnetising the examination of more than 1000 specimens of fossil current was approximately sinusoidal the total iron loss seeds, usually attributed to ferns, the author distinguishes I) was, within certain limits of the induction, given by a 15 genera or subgenera of Neuropterideæ, and 25 specific formula 1 = (a + bn) 197. where n is the number of periods types.-Remarks

Hugoniot's adiabatic law: M. per sec., B the " effective induction," and a and b are Jouguet.-On the use of helium as a thermometric subDastants. When from the total iron loss per c.c. per cycle

on

and on

its diffusion through silica : Adrien the sum of the statical hysteresis and the value that Jaquerod and F. Louis Perrot. An attempt to deterrory assigns to eddy-current loss was subtracted, a con- mine the melting point of gold with a thermometer of fused siderable quantity remained, which increased both when silica, and containing helium, failed owing to the rapid - frequency and the flux-density increased. This quantity, diffusion of the gas through the silica at the high temperaalled by Fleming the kinetic hysteresis, has been obtained ture. The velocity of diffusion appears to be proportional ** each experiment.-On the practical determination of the to the pressure of the gas, and is very considerable, since man spiserical candle-power of incandescent and arc lamps : after six hours' heating at 1100° C. the pressure of the 11. B. Dyke. Mr. Dyke points out the need of an improved helium had fallen to about one-seventh of the initial pressure. method of expressing the efficiency of glow-lamps, and Below a red heat, at about 510° C., the diffusion is still adopts the suggestion of Dr. Fleming of expressing the fairly rapid, and a very slow effect could even be traced *hole flux of light in lumens per watt. The expression of at 220° C. For practical purposes, therefore, the nitrogen

stance

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