SCIENCE- GOSSIP. 



RESEARCH PUBLISHING COMPANY, 



LIMITED. 



(Proprietors of Science-Gossip.') 

 There are 17 Debentures, value of ^10 each, remaining unallotted 

 in the above Company, for which applications are invited at par. 

 They bear five per cent, interest, payable half-yearly. 



This Company was formed for the purpose of conducting 

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 Capital of £1,250 should be subscribed for the further develop- 

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Address— The Secretary, Research Publishing Company, 

 Limited, no Strand, W.C. 



MICROSCOPES. 



A GENTLEMAN WANTED to show before _ Societies and 



introduce to Hospitals High-class Microscopes.— Liberal terms. 



Address, "Microscopes," Science-Gossip Office. 



MASON'S 



MICROSC OPICAL SPE CIMENS. 



SERIES OF 9 DOUBLY STAINED BOTANICAL SECTIONS. 



6 INSECT DISSECTIONS or 18 MISCELLANEOUS, 1/1. 



Practical Hints on Mounting, (Copyright Pamphlet) 6d. 



Netv List now ready, 1 stamp. 



R. G. MASON, 69 Park Rd., CLAP HAM, S.W. 



SECOND-HAND 



MICROSCOPES 



AND APPARATUS 

 BY ALL THE LEADING MAKERS, 



Including-BECK'S "LONDON," £12 10s. : 



BECK'S "BRITISH STUDENTS," £10 10s. ; 



WATSON'S " EDINBURGH STUDENTS," ^15 and ^12 10s. ; 



ZEISS' "IVa." £10; 



CROUCH'S "HISTOLOGIST," ^^ios. 



Complete with Accessories for Bacteriology. 



MANY ORDINARY FORMS FOR STUDENTS AND 

 AMATEUR WORKERS at moderate prices. 



Also ASTRO. TELESCOPES and Accessories. TRANSITS. 



SEXTANTS. LEVELS and THEODOLITES. 



LISTS ON APPLICATION. 



INSTRUMENTS BOUGHT, SOLD, or EXCHANGED. 



A. CLABKSON & CO., 



28BARTLETT'S BUILDINGS, HOLBORN CIRCUS, London. 



CHARLES A. SNAZELLE. 



NATURALIST, 



And Dealer in Microscopic Sundries, Lantern Slides, &c. 



A Large Number of Botanical and Zoological Micro Preparations, 

 by J. Hornell, of Jersey, in Stock. 



TO TEACHERS, STUDENTS, AND OTHERS. 



Type Collections offered as beloto, correctly named and 



localised. 



MOLLUSC A (Land, Freshwater, and Marine). 



[NOTICE.— Not confined to British Species o?ily.] 

 too Species in 4-drawer Deal Cabinet . . . . . . . , 25/-- 



150 ,. ° „ ,, ,, .. 40/- 



250 ,, 10 ,, „ „ . .. .. 70/- 



(SmaZl Specimens in Glass-topped Boxes.) 



LEPIDOPTERA (British and Exotic\ 



too Specimens— (well selected) .. .. .. .. .. 20/- 



200 „ ,, ,, .... .. 60/- 



Cabinets or Book Pattern Store Boxes extra. 



COLEOPTERA (British). 



100 Species— (neatly carded) in Store Box .. 7/6 & 10/6 



250 ,, ,, ,. ,, ,, 30/- 



;oo „ ,,,»,-„ •• .. 70/- 



Larger Collections offered at Special Terms. 



Price Lists on Application. 



4 TOLLINGTON PARK, LONDON, N. 



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, 

 Alcyonium ; Hormiphoria (preserved) ; Leptoplana ; Lineus, 

 Amphiporus ; Nereis Aphrodite, Arenicola, Lanice, Terebella ; 

 Lepas, Balanus, Gammarus, Ligia, My sis, Nebalia, Carcinus ; 

 Patella, Buccinum, Eledone, Pecten ; Bugula, Crisia, Perdicellina ; 

 Holothuria, Asterias, Echinus ; Ascidia, Salpa (preserved), Scyllium, 

 Raia, etc., etc. For Prices and more detailed Lists apply to 

 The Director, Biological Laboratory, Plymouth. 



HAOC PATENT - - 

 nUDD NEW MODEL 



PRISM BINOCULAR GLASSES. 



" The Power and Field of a Telescope in the compass of an 

 Opera Glass." 



Combining — 



PERFECT MECHANICAL CONSTRUCTION, 



EXTREME PORTABILITY and RIGIDITY, 



HIGH POWER and SPLENDID DEFINITION. 



Focussing by Adjustment of 

 Eyepieces. 



Price. 



£8 

 9 



10 



With spiral focussing arrange- 

 ment and one adjustable eye- 

 piece, 10s. each extra. 



Send for COMPLETE 



CATALOGUE of 

 MICROSCOPES, 



TELESCOPES. 

 PHOTOGRAPHIC LENSES, 

 CAMERAS and APPARATUS 

 LONDON MADE. OF ALL DESCRIPTIONS. 



Gold Medals and Highest Awards at all Great Exhi- 

 bitions. Awarded The Grand Prix, Paris, 1900. 



Magnification. 



8 diameters 

 10 

 12 



ROSS, Ltd., 



MANUFACTURE 

 OPTICIANS, 



111 NEW BOND STREET, LONDON, W., and 



31 COCKSPUR STREET, CHARING CROSS, S.W. 



Paris : 35 BOULEVARD DU TEMPLE. 



AND OF ALL LF.ADING DEALERS. 



PHYSIOGRAPHY, MINERALOGY, &c. 



Collections, Specimens and Series of Recks, Fossils, and Minerals 



Rock-forming Minerals, also for Chemical and Metallurgical 



Work, &c, can be supplied at moderate prices by 



JAMES XK. GREGORY &, CO, 



1 KELSO PLACE, KENSINGTON, LONDON, W„ 



Suppliers to Science and Art Department, British Museum, India, 

 . Colonies, &c. 



Microscopic Sections of Rocks and Minerals. 



Lantern Slides of typical Rock Sections. 

 lists free on application. 



TO GEOLOGISTS. 



1902. EIGHTH YEAR OF DISTRIBUTION. 1902. 



Typical Collections from famed Barton Beds 



{Upper Eocene). 

 Series 1, 2, 3. Boxed, Named, and Localised. 36 Varieties. Over 

 100 Specimens in each Series. 3s. each on receipt of postal orders. 



Also Suites of PARIS BASIN M0LLUSCA 



{Eocene, Oligocene, and Miocene). 

 P.oxed, Named, and Localised. 40 Varieties, 6s. 6d. ; 100 Varie- 

 ties, 15s. ', by Parcel Post on receipt of Postal Orders. 

 R. CHARLES, Naturalist, 

 HIGHCLIFFE-ON-SEA, CHRISTCHURCH. HANTS. 



COLLECTIONS OF 



MINERALS, SBELLS, FOSSILS, &c, 



For SALE. Also DUPLICATES cheap. 

 Apply to f. IMC. HELE, 



Warwick Lodge, KNOWLE, near BRISTOL. 



LIVING SPECIMENS FOR 

 THE MICROSCOPE. 



Volvox, Spirogyra, Desmids, Diatoms, Amoeba, Arcella, Actino- 

 sphaerium, Vorticella, Stentor, Hydra, Floscularia, Stephanoceros, 

 Melicerta, and many other Specimens of Pond Life. Price is. per 

 Tube. Post Free. Helix pomatia, Astacus, Amphioxus, Rana, 

 Anodon, &c, for Dissection purposes. 



THOMAS BOLTON, 



25 BALSALL IIFATTT ROAD, BIRMINGHAM. 



