to oer 
January 8, 1914] 
NATURE 
CXCV 
LANTERN SLIDES. 
All Teachers ani Lecturers interested in Natural 
Science should send for our new 
Supplementary Catalogue ‘‘E/13,” 
containing particulars of new slides in Botany, Zoology, 
Geology, Scenery, &c. 
Complete Catalogue ‘‘ E/12,” 
also free on application. 
FLATTERS & GARNETT, Ltd., 
309 OXFORD ROAD (,:r?s""5), MANCHESTER. 
Sales by Eluction. 
STEVENS’ AUCTION ROOMS. Esrp. 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 
icroscopes 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 to 
Mr. dd. C. STEVENS, 
38 KING STREET. COVENT GARDEN, LONDON, W.C. 
FOSSIL COLLECTION. 
JAMES R. GREGORY & CO. having purchased the well-known 
Collection of Silurian and Coal Measure Fossils. formed by 
the late Henry Johnson, of Dudley, are prepared to sell the 
Collection either separately or as a whole. Apply to 
JAMES R. GREGORY & CoO., 
Mineralogists, &c., 
139 FULHAM ROAD, SOUTH KENSINGTON, S.W 
Telephone: 2841 Western. Telegrams : “‘ Meteorites, London.” 
LIVING SPECIMENS FOR 
THE MICROSCOPE. 
Volvox, Spirogyra, Desmids, Diatoms, Ameeba, Arcella, Actinospherium, 
Vorticella, Stentor, Hydra, Floscularia, Stephanoceros, Melicerta, and many 
other specimens of Pond Life. Price rs. per Tube, Post Free. Helix 
pomatia, Astacus, Amphbioxus, Rana, Anodon, &c., for Dissection purposes. 
THOMAS BOLTON, 
25 BALSALL HEATH ROAD, BIRMINGHAM. 
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, Caryopbyllia, 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. 
N.B.—For Excellence and Superiority of Cabinets and Apparatus, 
references are permitted to distinguished patrons, Museums, Colleges, &c. 
A LARGE STOCK OF INSECTS, BIRDS’ EGGS AND SKINS. 
SPECIALITY.—Objects for Nature Study, 
Drawing Classes, &c. 
Birds, Mammals, &e., Preserved and Mounted by First-class 
Workmen true to Nature. 
All Books and Publications (New and Second-hand) on Insects, 
Birds’ Eggs, &c., supplied. 
86 STRAND, LONDON, W.C. 
(Five Doors from Charing Cross.) 
FOLL CATALOGUE POST FREE. 
ALL EINDS OF BRITISH AND FOREIGN 
Mineral Specimens, 
COMMON MINERAL ORES, and 
CHOICE CRYSTALLIZED SPECIMENS 
at ALL PRICES on view at 
RICHARDS’ SHOW ROOMS. 
PRICE LISTS FREE. 
48 Sydney Street, Fulham Road, South Kensington, London, $.W. 
SKELETONS & SKULLS = 
Specimens and Preparations for Teachinz i 
BIOLOGY & ZOOLOGY 
and for Museums. 
Lists on Application. 
EDWARD GERRARD & SONS 
Osteologists and Taxidermists, 
NATURAL HISTORY STUDIOS 
6I College Place, 
Camden Town, London. 
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 
Microscopic Objects. Specimens sent on approval. 
Prospectors’ Sets, Blowpipe Cases, Cabinets, Geologists’ 
Hammers, Card Trays, Glass-Capped Boxes, Models of Crystals, 
and all Apparatus for Mineralogists and Geologists. 
NEW CATALOGUES POST FREE. 
RUSSELL & SHAW, 38 Ct. James Street, Bedford Row, London, W.C. 
NOTICE,.—Advertisements and business letters for “*‘ Nature” should be addressed to the Publishers; Editorial Com. 
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