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BAUSCH & LOMB'S MICROSCOPES.
NEW and IMPROVED MODELS for every branch of
4 13 9
4 11 9
and circular dust-proof nose-piece
5 6 9 BH3 Microscope, with 3" and t" objectives and 2 eye-pieces 4 17 6 BH4
ditto, ditto, and circular dust-proof nosepiece
piece, screw-out substage, and Abbe condenser... 7 19 6
6 12 0
12" oil immersion objectives, 2 eye-pieces,
13 2 6
16 7 0 BBH8
18 4 6 Mechanical Stage, to fit any of above, in morccco leather
BAUSCH & LOME OPTICAL CE All Instruments are complete in fine mahogany lock and key cabinet. Also MICROTOMES, CENTRIFUGES, PHOTO- MICROGRAPHIC AND PROJECTION APPARATUS, PRECISION LABORATORY GLASSWARE, &c.
"MANIPULATION OF THE MICROSCOPE," by EDWARD BAUSCH, 4/
The Bausch & Lomb Optical Co.,
CONTRACTORS TO BRITISH AND FOREIGN GOVERNMENTS.
Depot for British, Colonial, Cape, Indian, and South American Trade.
An accurate miniature Meteorological
Observatory for Scientific, Industrial, and Hygienic purposes.
Invaluable for Forecasting the Weather.
With Cardbuard Dial 20/-
25/ Pamphlet, fully describing its many applications, how
to use, and the results obtainable, post free. A.GALLENKAMP & CO., Ltd.
19 & 21 SUN STREET, FINSBURY SQUARE, LONDON, E.C.
“ Have Won More Awards Than Any Others.” MORE THAN 300 GRANDS PRIX, GOLD MEDALS, &c. Makers to H.M. the King, H.M. the Queen, H.R.H. the Prince of Wales, and other Royal Houses of Europe.
SCIENTIFIC BOOKS & SCIENTIFIC PERIODICALS
Purchased in any quantities for cash. No charge is made for estimates, and all expenses of packing,
clearing and carriage are borne by us. Payment is made immediately upon acceptation of offer. W. HEFFER & SONS, Booksellers,
Celebrities Say SANATOGEN
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r We can supply a complete bound set of "Nature."
255. ; Debrett's Peerage, 1907, 2 vols., 335., for 6s. 6d. ; Business Cyclopedia, 7 vols., 525. 6d., for zos. ; Connold's British Vegetable Galls, 159., for 8s. 6d.; Indiar. Art at Delhi, 1904, 125. net, for 6s. ; Crawley's Tree of Life, 125., for 6s. 6d. ; Harvie-Brown's Travels of a Naturalist in Northern Europe, 2 vols., 635., for 1os. 6d.; Kappel and Kirby's British and European Butterflies, coloured plates: 255. net, for 125. 6d. ; Furnival's Leadless Decorative Tiles, Faience and Mosaic, £6 6s., for 215. ; Harmsworth's Encyclopædia, 56s., 10 vols., for 32s. ; Staffordshire Pots and Potters, 215., for ios. 6d. ; Cust's Authentic Portraits Mary Queen of Scots, 635., for 185. 6d.; A. R. Wallace's My Life, 2 vols., 255. net, for 8s. 6d. , Plunket's Ancient Calendars and Constellations, gs., for 45. 61.; Scberren's Zoological Society of London, 305., for jos. 6d. ; Johns' Flowers of the Field, coloured plates, 75. 64.; Round's Federal England, 125. 6d., for 6s. 6d.-Baker's GRÉAT BOOKSHOPS, 14 and 16 John Bright Street, Birmingham.
References in principal towns at home and abroad.
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Mr. Hall Caine, " Sanat
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ogen seems to me a very valuable food and
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the Writer: "I have found the Author : "I have been taking Sanatogen since the beginning of
Sanetogen helpful in digestive
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the well-known Medical Author: the well-known Author : "I have
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of giving pbosphorus in such a
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atives I know of." Sanatogen can be obtained from all chemists, in tins from IS. 9d. to gs. 6d. A beautifully illustrated pamphlet, containing much valuable information, will be sent to you, post free, on receipt of a postcard addressed to the Sanatogen Company, 12 Chenies-street, London, W.C.
Mr. Eden Phillpotts,
MINERALOGY & GEOLOGY. WATKINS & DONCASTER,
Naturalists and Manufacturers of CABINETS AND APPARATUS FOR ENTOMOLOGY, BIRDS' EGGS AND SKINS, AND ALL
BRANCHES OF NATURAL HISTORY.
NEW MINERAL PREPARATIONS. We have now tiken up the making of mineral preparations, which, owing to our usually large stock of fine crystals, we can furnish in the very best uality and at reasonable prices.
NEW COLLECTION OF 100 MINERAL PREPARATIO in ditterent qualities. Price according to quality, 720.—, 1100.-, 1400.-, 2000.- Marks.
Among other minerals this collection contains Crystal-plates perpendicular to the I. Bisectrix of BENITOITE (M. 8.- to 20.--), DANBURITE (M. 10.– to 30.-), EUCLASE (M. 12.– to 40.-), KUNZITE M. 8.- 10 25.-), RUBIS (artificial), M. 8.- to 25.
Pieces in the form of a parallelopipedon, showing Pleochroism, RUBELLITE, light and dark red (M. 14.-10 50.--); KUNZITE, colourless and amethystine (M. 15.- to 40.-).
NEW PRISMS OF SINGLE AND DOUBLE REFRACTING minerals for crystallographic.optical exercises of students : Garnet, Fluorspar, Quartz, Tourmaline, &c.
We specially point to our COLLECTION OF THIN SECTIONS for petrographical studies : 1. New large collection of 225 orientated thin sections,
arranged according to Rosenbusch-Wülfing : Microscopical Physiography of the rock-forming minerals (134 minerals are repre. sented in this collection)
M. 385.II. Petrographical collection of 114 sections, showing the
mode of occurrence of the rock-forming minerals
SPECIAL SHOW-ROOM FOR CABINETS.
Drawing Classes, &c.
Workmen true to Nature.
(Five Doors from Charing Cross.)
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Volvox, Spirogyra, Desmids, Diatoms, Amoeba, Arcella, Actinosphærium, Vorticella, Stentor, Hydra, Floscularia, Stepbanoceros, Melicerta, and many other specimens of Pond Life. Price is: per Tube, Post Free. Helix pomatia, Astacus, Ampbioxus, Rana, Anodon, &c., for Dissection purposes.
THOMAS BOLTON, 25 BALSALL HEATH ROAD, BIRMINGHAM.
Sales by Auction.
at 12.30, which affords first-class cpportunities for the disposal or
and Miscellaneous Property. Catalogues and terms for selling will be forwarded on application to
Mr. J. C. STEVENS, 38 KING STREET, COVENT GARDEN, LONDON, W.C.
MARINE BIOLOGICAL ASSOCIATION
OF THE UNITED KINGDOM.
THE LABORATORY, PLYMOUTH. The following animals can always be supplied, either living or preserved by the best methods :
Sycon; Clava, Obelia, Sertularia ; Actinia, Tealia, Caryophyllia, Alcy.
For prices and more detailed lists apply to
GEOLOGISTS' AND MINERALOGISTS'
Collections of Minerals, Rocks, or Fossils, from 5/6
Sections of Rocks and Minerals, 11- each. Rectangular or Round Glass-capped Boxes, from 1/- dozen. Hammers, detachable heads and iron-bound shafts, from 3/6 Cabinets and Boxes, from 4,6 Card Trays, from 3/6 gross.
Dichroiscope, 12/6 Specific Gravity Balance, 36/
Catalogue of Colletions, Specimens, and Apparatus, post free. THOMAS D. RUSSELL, 11 John Street, Bedford Row, London, W.C.
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A Class Book of Physics.
By Prof. R. A. GREGORY and H. E. HADLEY,
B.Sc. Illustrated. Crown 8vo. 45. 6d. Parts I., II., and III., Fundamental Measurements, Hydrostatics and Mechanics, Heat, 25. ; Parts III., IV., and V., Heat, Light, and Sound, 25. ; Parts IV. and V., Light and Sound, is. 6d. ; Parts VI., VII., and VIII., Magnetism, Static Electricity, Voltaic Electricity, is. 61.
(Friday. NEW IMPRESSION, THOROUGHLY REVISED.
Py Sir LOCKYER,
Illustrated. Fcap. Svo.
Elementary Lessons in Astronomy. RC MOED.N.S.E.RS: Cotton Spinning Calculations. B. WILLIAM SCOTT TAGGART, Problem Papers in Mathematics on the Lines
of Examinations by the Civil Service Commission with Revision Papers in Trigonometry, Co-ordinate Geometry, Mechanics and
Calculus. By R. C. FAWDRY, M.A. Crown 8vo. With Answers, 45. 6d. ; without Answers, 35. 60.
MACMILLAN AND CO., LTD., LONDON.
ILLUSTRATED LIST POST FREE.
instrument of any design a simple matter.'
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THE 'SOHO' REFLEX CAMERA
(ENGLISH JADE THROUGHOUT).
£18 0 54x3
12 10 i-plate 24 10 Write for the 26-page Illustrated Booklet
of the SOHO' REFLEX.
MARION'S 'PERFECTION'FIELD CAMERA.
SUPERIOR WORKMANSHIP. Fitted with brass turn. table, 3-fold sliding tripod and 3 double dark slides,
book-form For 64 X 4
9 15 12 X 10
14 10 Other sites in proportion. FULL DETAILS ON
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A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE.
“To the solid ground
Of Nature trusts the mind which builds for aye."-WORDSWORTH.
(All Rights are Reserved.
REYNOLDS & BRANSON, Ltd. s Transpaque" Lantern
This Lamp can be supplied geared
for Alternating Current. Has all the advantages
Catalogue of Lanterns, &C., of our well-known
24 ., post free. Demonstrator's' Lanterns, and in -addition will show brilliantly on the
screen, opaque objects or book illustrations, if not
larger than a large postcard.
The R. & B." Phenix” Arc Lamp, with nearly parallel motion, for optical
lantern; hand feed. Can be fitted to any ordinary lantern £2 2 0 A-Striking Gear. B-Adjustment for altering inclination of carbon. CAdjustment for carbon. D-Milled head screw for altering distance of carbons. E–Vertical adjustment of radiant. F- Horizontal adjustment for radiant. 14 COMMERCIAL STREET, LEEDS.
THE "LONDON” I NEGRETTI & ZAMBRA'S
Latest METEOROLOGICAL INSTRUMENT.
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