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LIQUID AIR AND LIQUID HYDROGEN. .

1.40

4

IMPORTANT COLLECTION OF LEPIDOPTERA.

Dr. HAMPSON'S AIR-LIQUEFIER is now made to a standard patTUESDAY AND WEDNESDAY, MAY 16 AND 17, AT ONE O'CLOCK. tern, and numbers are in use in University Laboratories and elsewhere in MR. J. C. STEVENS will offer at his very easily moved ; the Liquefier, without stand, being a cylinder 17 leches

various countries. The whole apparatus is neat and compact and its parts Rooms, 38 King Street, Covent Garden. London, W.C., the second high and 8 inches in diameter. portion of the unrivalled COLLECTION OF BRITISH LEPI. It begins to liquefy air in from 6 to 10 minutes after the admission of air DOPTERA formed by the late Philip B. MASON, M.R.C.S., F.C.S.. at from 150 to 200 atmospheres pressure, making over 1 litre of liquid per F.Z S., F.E S., &c. of Trent House, Burton-on-Trent, comprising hour. long and superb series of most of the rare and extinct species, fine It requires no auxiliary refrigerant and produces a perfectly clear liquid varieties and local forms in the best state of preservation, also many which requires no filtering. valuable and historic specimens and types from the Haworth and other The operator has only one gauge to watch and one valve to control. Collections, together with the first rate Standish and other Cabinets in which they are arranged.

HYDROGEN LIQUEFIER to the designs of Dr. MORRIS W.

TRAVERS for use in conjunction with Air.Liquefier. On View the Monday prior and Mornings of Sale. Catalogues ready a week prior to Sale, post free on application.

For Prices and Particulars apply to the Sole Makers :THE EXECUTORS

BRIN'S OXYGEN COMPANY, LIMITED, OF THE LATE COLONEL WATKIN, C.B. (Inventor of the Range Finder) are

ELVERTON STREET, WESTMINSTER, S.W. offering the following for sale :1. 6 in. Holtzaffel Lathe, with divided headstock and overhead gear,

JAMES SWIFT & SON'S
and a very complete set of fittings. for engine, wood and metal
turning, with a numerous assortment of small tools.

NEW PAN-APLANATIC OBJECTIVES II. 4H.P. de Dion engine, water cooled with tanks, &c., and dynamo OF THE HIGHEST POSSIBLE OPTICAL EXCELLENCE.

by Canning and Co., 30 volts, 20 amps. III. 7-6 volt Accumulators in teak cases, 9 amps.

Apochromatics. }" N.A., 1.30, oil immersion

£8 8 0 IV. H.P. Crocker Wheeler Motor.

10 10 0 V. $ in. Spark Coil.

1/12"
1.40

8 80

Pan-Aplanatics. VI. X-Ray Apparatus, consisting of 12 in. spark coil, 3 Crookes' tubes, !" oilimmersion, N.A., 1.30

0 0 screens, &c. 1/10"

4 оо VII. Carpenter's Bench and Tools.

1/12"

5 5 0 The whole can be seen by appointment at Ordnance House, Enfield

Dry Series Pan-Aplanatics.
Lock, Middlesex, or particulars may be obtained from Mr. Hicks,

" N.A., 0.30 ...
5 0 " N.A., 0.80

1 16 0 Mathematical Instrument Maker, 8 Hatton Garden, London.

0.50
оо

0.88

2 17 0 0.30 4 0

0.92

2 оо

NATURE says:-"In the excellence of their 1/12.in. homogeneous For Photography, Unsurpassed for fine definition.

oil immersion, they have produced an English-made lens of first-rate capacity which is a marvel of cheapness.

LISTS POST FREE ON APPLICATION.

UNIVERSITY OPTICAL WORKS,

81 Tottenham Court Road, London.
Send a card merely quoting 2159.
TAYLOR. TAYLOR HOBSON. LE

IF YOU WANT TO OBTAIN COPIES
OF-

PRICES COMPLETE
Circulars, Price Lists,

No. 1. 121 by 69" 9/2 Plans, Diagrams, Speci

No. 2. 144 by 9"

12/3 fications, Music, &c.,

No. 3. 22 by 15" 19/6 USE "HE

Including a roll of Hecto "HECTO SHEET"

Sheet," 6' 6" long, and The Simplest and

bottle of ink. Cheapest Duplicating

Each roll can be used two
MANUFACTURERS
CATALOGUES Process.

or three times. OF

FREE. ELECTRICAL TESTING INSTRUMENTS.

DURHAM HOUSE, NORTH SIDE, CLAPHAM COMMON, LONDON, S.W.

PATENTAE AUTO-HECTO FRAME

1.30
1.30

£2

2
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COOKE JENSES

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AMBRELL BROS.

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NO WASHING. NO MELTING. NO INKING.
Write for Specimens, &c., or call

and see this useful Invention.
AUTOCOPYIST CO. (Dept. 1),
64 Queen Victoria St., London, E.C.

PHOSPHORESCENT POWDERS

to Phosphoresce by Day

or Ultra-Violet Light.
In neat Ebonite and Brass Boxes with

Mica Window.
Price 3/6 each, or 18/6 set of six.
A. C. COSSOR, 54 Farringdon Road, E.C.

TELEPHONE 10547 CENTRAL.
Gold Medal awarded St. Louis Exhibition, 1904.

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NOTICE.
Proof Copies of the Photogravure Portrait of
PROF. SUESS appearing in “Nature” of to-day
can be obtained from the Publishers at 5s. each.

ST. MARTIN'S STREET, LONDON, W.C.

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THE SYTAM SYSTEM

PRETUL

RADIUM

Saves an incredible amount of wall space and completely utilises dark corners, recesses, and out-of-the-way places.

Prevents crowding and confusion.
Allows for extension as and when required.

Always room for more, hence reorganisation seldom or never necessary.

Saves time, lightens work, and increases comfort by producing perfect order in the Laboratory, Library, Study, Home, Office, &c.

We have a limited consignment of

PURE RADIUM BROMIDE

SOME SYTAM FITTINGS. 1. THE BOTTLE ELEMENT.

One hundred 4 oz. bottles are arranged in one Sytam Bottle - Element occupying less than

1 sq. ft. of wall space, each bottle is instantly of the

located, removed or replaced, and any size from

1-oz. to a Winchester can be accommodated in VERY HIGHEST ACTIVITY

one and the same element.

S 2. THE CLOSED-FRONT BOOK ELEMENT. and are open to supply same in

3. THE OPEN-FRONT BOOK ELEMENT. 5 mg. tubes at a

4. THE AUTHOR'S FILE. REASONABLE PRICE.

For division of subject into headings, chapters

or sections, W. MARTINDALE, 5. THE TWIN DESK-TRAYS. Manufacturing Chemist,

6. THE PAMPHLET FILE. 10 NEW CAVENDISH STREET, LONDON, W. ?

man

| THE SYTAM FITTINGS CO., Telephone : 1797 Paddington. Telegrams : Martindale, Chemist, London.

18 & 19 BASINGHALL BUILDINGS, LEEDS. GLEW'S SCINTILLOSCOPE

Rare Chemicals,
(PATENT).
Shows a magnificent display of scintillations,
showers of sparks, direct from the mineral Pitch:

Rare Metals,
blende, Radium, Polonium, Uranium, Thorium, or any
radio-active substance, even a Welsbach mantle con.

Rare Minerals
tains sufficient Thorium to excite the very sensitive
screen of the Scintilloscope, which is far more sensi.

For Laboratory, Scientific, and all other tive than the Spinthariscope. The Scintilloscope

purposes. rivals the most delicate Electroscope as a detector SCREEN of Alpba rays.

RADIUM SALTS & RADIO-ACTIVE PREPARATIONS. The eye sees an inexhaustible shower of stars of POSTSLENDIS white light, giving a very realistic idea of the ceaseless

CALCIUM METAL 1/6 oz.; 20/- lb. activity of these marvellous substances which are pro. ducing the terrihc bombardment causing this beautiful display. r See NATURE, September 29, page 535.

Price List on Application.
Glew's Scintilloscope Superior Lens, with Extra-sensitive Pitchblende and

Polonium Screens, giving brilliant effects, Complete, 75. 6d., Post free,
U.K. Foreigo Postage extra, weight 2 ounces.

itchblende mineral, ground flat and polished, with Sensitive Screen attached, for use in Scintilloscope or with any strong pocket magnifier, from 78. 6d. each, according to size.

Chemical Manufacturers and Dealers, Radio active supplies of every description, on Sale or Hire. Radium

OLIVER'S YARD, CITY ROAD,
Bromide, 1.800,000 units on bire for lectures.
F. HARRISON GLEW, Radiographer (Silver Medallist, Paris, 1900),

LONDON, E.C.
156 Clapham Road, London, S.W.
SCHOOL BOTANY.
We have prepared for use in
Primary & Secondary Schools
COLLECTIONS OF

Naturalists and Manufacturers of
SPECIMENS OF VARIOUS

WOODS AND OTHER BOTANICAL OBJECTS.

AND CABINETS. The former are very carefully selected in cross and long sections, in order to show

MAMMAL SKINS. BIRD SKINS. the distinctive features and marks of each individual

BIRDS' EGGS in clutches with full data. wood, and also to show their Pell-marked Botanical

BOOKS ON ALL NATURAL HISTORY SUBJECTS. Characteristics, such as the Bark, Rings of Growth, Medullary Rays &c., &c.

Catalogues Post Free. 5 Nav Tlustrated List in Botany and Plant Physiology (including

full particulars and prices of above) now ready, post free.

. GALLEN KAMP & CO., Ltd., 19 & 21 SUN STREET, Finsbury Square, LONDON, E.C.'

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HARRINGTON BROS.,

ROWLAND WARD,

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ENTOMOLOGICAL APPARATUS

THE JUNGLE, 166 PICCADILLY, LONDON,

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E LARGE

INDUCTION
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WITH

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Fitted with ZEISS LENSES.

Also MANUFACTURERS of
X-RAY and HIGH-FREQUENCY APPARATUS of various patterns.
LIGHT BATHS of all kinds, Cabinet, Reclining, Portable Baths, with

three-colour arrangements, with Incandescenr and Arc Lamps, &c.,
with Arc-Light Projector for simultaneous local treatment. (Combined

Patent.)
NEW PATENT SHENTON-SANITAS X-RAY COMBINATION

OPERATING TABLE.
“TRIPLET” and “DERMO” LAMPS with Carbon and Iron Elec-

trodes for “Finsen" Treatment.
VIBRATORY AND PNEUMATIC MASSAGE APPARATUS.
APPARATUS FOR 3-PHASE SINUSOIDAL AND ALL OTHER

CURRENTS.
NEW PORTABLE CAUTERY TRANSFORMER, with Terminals for

Light, &c., taking only 2 Ampères from 200 Volts Continuous Main.
MULTINEBULIZER, ELECTRO-MAGNETIC AND SWEDISH EX-

ERCISE APPARATUS, &c., &c. 38 & 7a, SOHO SQUARE, LONDON, W.

Sizes-6x9 and 9 X 12 cm., and 31 in. x 4+-in. and 5-in. X 4.in.

Also 9 x 18 cm. for Stereo and Panorama.
SUITABLE FOR PLATES, PACK FILMS, AND

ROLL FILMS.
Illustrated Catalogue, Pn," Post Free on application.

REYNOLDS & BRANSON, LTD. THE JUBILEE CATALOGUE

Scientific Instrument Makers to the Indian Government and Science and Art Department.

ISSUED TO MARK THE LABORATORY FURNISHERS AND FIFTY YEARS' EXISTENCE OF THE FIRM MANUFACTURING CHEMISTS.

OF
NEW PHOTOGRAPHIC DARK ROOM LAMP F. LFYBOLD'S NACHFOLGER.

THE “RYSTOS"
ELECTRIC LAMP

COLOGNE,
(No. 1)
For Standing or Hanging, with Cord and Contains on its more than 900 pages a complete
Plug to fit ordinary lamp socket, and survey of the apparatus used for instruction in
Reversing Switch. The insulated switch
handle on top will be found safe and well

Physics, as well as numerous practical instrucadapted for turning on the current to

tions and about 3000 illustrations.
either ruby or white light, or instantly
exchanging the one for the other. The

www
white light is convenient when making NATURE says : --" The firm of Leybold Nachfolger
bromide prints, transparencies, &c. The

in Cologne has recently issued a very complete and ruby glass provided is of special quality, being spectroscopically tested. It gives

interesting catalogue of physical apparatus and a soft diffused light, while its semicircular

fittings sold by them The book starts with a history shape secures the illumination of the of the instruments made in Cologne during the last whule developing table.

century. In its second section we find an account Dimensions, 4 in. x 8} in.

of the construction and fittings of various chemical Price 18s. d.

and physical institutions. After this follows the cata(When ordering, please mention voltage.)

logue proper, filling some 800 large pages, profusely

illustrated and admirably arranged. The book will be LAMPS FOR GAS ALSO WITH BYE-PASS. most useful to the teacher." No. 1846, Vol. 71.) New Photographic Requisite List on application,

THE CATALOGUE WILL BE FORWARDED TO SCHOOLS

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THURSDAY, MAY 4, 1905.

Bohemian product declined so much that at last, in
November, 1834, the Suess family left England for
Prague. The father in 1845 became a partner in a

great industrial establishment in Vienna, and that city SCIENTIFIC WORTHIES.

was thenceforth the family home. It had been at first

intended that the son should enter the same business, XXXV.- EDUARD SUESS.

and accordingly at 'the end of the usual school trainAMONG the living leaders of geology none is more ing he was placed in the polytechnic school. But it

! widely known and more highly honoured than soon became apparent that his natural bent did not Eduard Suess. The amount and value of his original lie in the commercial direction, but wholly towards contributions to science, the broad, philosophic grasp natural history studies. As early as the year 1850, he has displayed of every department of research on when he was only nineteen years of age, he ventured which he has entered, the vivid, imaginative insight . upon his first publication—a short sketch of the geology which has enabled him to marshal a multiplicity of of Carlsbad and its mineral waters, specially prepared scattered facts into connected order and sequence, the for the use of foreigners. So completely had his tastes unwearied industry with which he has made himself now decided his future life that in the following acquainted with the geological literature of almost year he was appointed an assistant in the Imperial every country on the face of the globe, and the noble Museum of Vienna, and thus made his formal entry march of the literary style in which he has clothed not into the official ranks of science. From that day until a little of his reasoning and speculation, have com- now the long intervening half-century, though unbined to give him a place apart, like that of one of eventful in personal experiences, has been with him the great masters in the heroic age of geology. Full a time of ceaseless industry and fruitful research. A of years and honours, and president of the Academy of few more specially notable epochs in his career may Sciences, he still moves as the centre of the scientific here be noticed. life of Vienna, still enriches the world with his im- In the vast palæontological collections of the Vienna pressive pictures of the structure and history of the Museum Suess found a wide domain for the exercise earth, and still manifests an ardent interest and of his powers of observation and comparison. He at enthusiasm in all that concerns the advancement of first specially devoted himself to the study of the natural knowledge.

brachiopods of the Palæozoic and Mesozoic formations, But for a wave of change in the world of commerce and for some ten years continued to publish the results we might have claimed Suess as an Englishman, and of his researches among these interesting and imhis achievements might have added their lustre to the portant fossils, but with incursions into other departscientific fame of this country instead of Austria, for ments of the animal kingdom, which displayed a he was born in London and spent here the earliest general enthusiasm for biological inquiry from the geoyears of his childhood. His father, who was a native logical point of view. His zeal and ability were soon of Saxony, had settled here as a German merchant,. recognised by his being appointed in 1857, at the age importing wool from Bohemia, and it was during the of twenty-six, professor in the university. In 1862 he residence of the family in London that the eldest son relinquished his post in the museum and devoted himand future geologist was born on August 20, 1831. self thenceforth to the duties of his chair. It was in this When wool began to arrive in abundance from the vast early part of his life that he entered upon those studies sheep-runs of the Australian colonies, the trade in the in palæogeography on which his scientific renown

on

now largely rests. As far back as 1863 he published him so conspicuous an eminence among the a brief statement of the results to which his inquiries geologists of the day. It sketches the general prinhad led him as to the former connection of northern ciples of mountain-architecture, especially revealed by Africa with southern Europe. In 1855 he married the a study of the Alpine chain. But he did not confine daughter of Dr. Strauss, a distinguished physician in his view to the particular area with which he was himPrague, and then entered on a life of great domestic self personally familiar. Already his eye looked out happiness, which largely contributed to the success of on the wider effects of the unequal contraction of the a strenuous career wherein science and politics came to terrestrial crust, and swept across the European conbe strangely blended.

tinent eastwards into Asia, and westwards across the From his youthful days, when he described the Carls- | Atlantic into America. He still held the general belief bad springs, he had been interested in underground in the upheaval and depression of continental areas, waters, and among the inquiries which he pursued and dwelt on the evidence of these movements in while attached to the museum was one that embraced Scandinavia, which he has since rejected with much the relations of the soil and water supply of Vienna to elaboration of argument. To thoughtful students of the life of its inhabitants. In 1862 he published a the science this treatise, in its firm hold of detail comsmall volume on this subject,' in which he gave a bined with singularly vivid powers of generalisation, comprehensive account of the economic geology of the was full of suggestiveness. But the interest and imdistrict. At that time the city was suffering from an portance of its subject did not obtain general recogimpure water supply and consequent typhoid fever. nition until it was followed ten years afterwards (1885) The luminous essay of the young professor at once by the first volume of the great “ Antlitz der Erde attracted attention. He was the same year elected -the work which has chiefly given Suess his place into the town council, that he might give the benefit among his contemporaries, and by which his name will of his advice in the steps to be taken towards the be handed down to future time. attainment of better sanitary arrangements. He In its striking arrangement of subjects, in its boldly advocated a scheme for bringing the abundant masterly grouping of details which, notwithstanding pure water of the Alps into Vienna by means of an their almost bewildering multiplicity, are all linked aqueduct 110 kilometres in length. This project, with each other in leading to broad and impressive coneventually adopted, was brought to a successful termin- clusions, and in the measured cadence of its finer ation in 1873. So grateful were his fellow-citizens passages, the “ Antlitz” may be regarded as a noble for the signal service thus conferred on them that they philosophical poem in which the story of the continents bestowed on him their highest civic distinction by elect- and the oceans is told by a seer gifted with rare powers ing him an honorary burgess. By this time he had of insight into the past. The order of treatment is made his mark in the town council as one of its most not that of a systematic text-book. On the contrary, useful and able members, so that it was not surprising the casual reader who looks over the contents of the that he should have been chosen as one of the parlia- chapters might suppose them to consist of a series of mentary representatives. For more than thirty years desultory essays with no very clear sequence of thought. he sat in the Austrian Parliament as a powerful leader Yet a more leisurely study soon shows him how closely of the Liberal party, only retiring in 1896, when interwoven is the texture of the whole composition. advancing age made the strain of the two-fold life as He is astonished at the almost incredible range of a politician and man of science too great to be longer literature which the author must have consulted, and borne. When the political history of the country he finds himself borne onward page after page by the during the last half of the nineteenth century comes luminous array of facts and the brilliant conclusions to be written, a prominent place in it will be given drawn from them. From the ancient traditions of the to Eduard Suess.

Deluge he is led through other human records, and But it is his scientific work that has to be chiefly made to see by what combination of physical condwelt upon here. As an enthusiastic and able teacher ditions changes are worked on the surface of the earth. he has exerted a notable influence on the successive l'pheaval and subsidence, volcanic eruptions, the generations of students at the university, until after elevation of mountain-chains, the depression of seaforty-four years he resigned his professorship in the basins, the structure and disposition of continents, the summer of 1901. Throughout his career he has shown formation and boundaries of the different oceans in a keen interest in those branches of geology which the past as well as at the present day, the successive more especially deal with the evolution of the earth's plications that in the course of geological time have surface features. The problems of mountain-building produced the land areas and mountain-ranges of the were suggested to him by his excursions among the globe-in short, the gradual evolution of the existing eastern Alps, and in 1875 his views were so far matured topography of the surface of the globe—this vast theme that he published a little volume entitled “Die is here treated with a fulness of knowledge and a Entstehung der Alpen.” This work contains the germ breadth of view which are to be found in no other of those later contributions to science which have placed author. 1.“ Der Boden der Stadt Wien nach seiner Bildungsweise Beschaffenheit, geologists of every country, and the influence of its

The work at once commanded attention among the und seinen Beziehungen zum Bürgerlichen Leben." (Vienna, 1862.)

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