FEBRUARY 5, 1914] 
NATURE 
CCXXXV 
LANTERN SLIDES. 
NOW READY. 
Supplementary Catalogue 
of Lantern Slides, E/13, 
POST FREE. 
Being new subjects added during the past year. 
British Flora, British Birds, 
Commercial Geography by Dr. Wilmore, 
Geology, &c. 
FLATTERS & GARNETT, Ltd., 
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Sales by #Huction. 
STEVENS’ AUCTION ROOMS. Estp. 1760. 
A Sale by Auction is held EVERY FRIDAY 
at 12.30, which affords first-class opportunities for the disposal o» 
urchase of SCIENTIFIC AND ELECTRICAL APPARATUS, 
ae and Accessories, Surveying Instruments, Photographic 
Cameras and Lenses, Lathes and Tools, Cinematographs and Films, 
and Miscellaneous Property. 
Catalogues and terms for selling will be forwarded on application 10 
Mr. J. C. STEVENS, 
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METEORITES 
Meteorie Iron and Stones in all sizes and prices. 
Apply stating requirements, &c., to 
JAMES R. GREGORY & CO.,, 
MINERALOGISTS, &c., 
139 FULHAM ROAD, SOUTH KENSINGTON, S.W. 
Telecrams: ‘‘ Meteorites," London. Telephone: 2841 Western. 
LIVING SPECIMENS FOR 
THE MICROSCOPE. 
Volvox, Spirogyra, Desmids, Diatoms, Amceba, Arcella, Actinosphzrium, 
Vorticella, Stentor, Hydra, Floscularia, Stephanoceros, Melicerta, and many 
other specimens of Pond Life. Price 1s. per Tube, Post Free. Helix 
pomatia, Astacus, Amphioxus, Rana, Anodon, &c., for Dissection purposes. 
HOMAS BOLTON, 
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a 
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- 
onium; Hormiphora (preserved); Leptoplana; Lineus, Amphiporus, 
Nereis, Aphrodite, Arenicola, Lanice, Terebella; Lepas, Balanus, 
Gammarus, Ligia Mysis, Nebalia, Carcinus; Patella, Buccinum, Eledone, 
Pectens Bugula, Crisia, Pedicellina, Holothuria, Asterias, Echinus, 
Salpa (preserved), Scyllium, Raia, &c., &c. 
For prices and more detailed lists apply to 
Biological Laboratory, Plymouth. THE DIRECTOR. 
WATKINS & DONCASTER, 
Naturalists and Manufacturers of 
CABINETS AND APPARATUS 
FOR COLLECTORS OF INSECTS, BIRDS' EGGS AND SKINS, 
MINERALS, PLANTS, &c. 
BIRD NESTING BOXES of various patterns. 
A LARGE STOCK OF INSECTS, BIRDS’ EGGS AND SKINS. 
SPECIALITY.—Objects for Nature Study, 
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86 STRAND, LONDON, W.C. 
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EDWARD GERRARD & SONS 
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NATURAL HISTORY STUDIOS 
6I College Place, 
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Collections of British and Foreign 
MINERALS, ROCKS, FOSSILS. 
25 Specimens, 5/6; 50 do., 10/6; 100 do., 21/-; 200 do., 42/-. 
20 Coal Measure Rocks and Fossils, 12/6; do., larger, 15/-. 
In Polished Deal Boxes. 
Inspection invited of a large stock of Minerals, Rocks, Fossils, and 
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