AvuGuUST 22, 1912] 
NATURE 
cclv 
Sales by Fuction. 
STEVENS’ AUCTION ROOMS. Esrp. 1760. 
Sale by Auction is held EVERY FRIDAY 
at 12.30, which affords first-class opportunities for the disposal o1 
purchase of SCIENTIFIC AND ELECTRICAL APPARATUS, 
Microscopes 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. J.C. STEWVENS, 
38 KING STREET, COVENT GARDEN, LONDON, W.C. 
SECOND-HAND DEPARTMENT 
Microscopes, Telescopes, Spectroscopes, 
Binoculars, Surveying Instruments, &c., 
BY THE BEST MAKERS AT MODERATE PRICES. 
Lists sent post free. 
> 
WATKINS & DONCASTER, 
Naturalists and Manufacturers of 
CABINETS AND APPARATUS 
FOR COLLECTORS OF INSECTS, BIRDS' EGGS AND SKINS 
MINERALS, PLANTS, &c. 
SPECIAL SHOW-ROOM FOR CABINETS. 
N.B.—For Excellence and Superiority of Cabinets and Apparatu: 
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 on Natural History supplied. 
86 STRAND, LONDON, W.C. 
Instruments Bought, Exchanged and Sold. (Five Doors from Charing Cross.) 
JOHN BROWNING, aa oe NEW CATALOGUE POST FREE. 
LIVING SPECIMENS FOR 
THE MICROSCOPE. 
ALL KINDS OF BRITISH AND FOREIGN 
Mineral Specimens, 
COMMON MINERAL ORES, and 
CHOICE CRYSTALLIZED SPECIMENS 
= Salven; Se OER, Distoms, Aniceba, Aree Peo pherinm, at ALL PRICES on view at 
orticella, Stentor, Hydra, Floscularia, Stephanoceros, Melicerta, and many 
other specimens of Pond Life. Price 1s. per Tube, Post Free. Helix RICHARDS’ SHOW ROOMS. 
pomatia, Astacus, Amphioxus, Rana, Anodon, &c., for Dissection purposes. Note new Address :— Lists free. 
THOMAS BOLTON, 
25 BALSALL HEATH ROAD, BIRMINGHAM. 
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. 
SKELETONS & SKULLS 
Specimens and Preparations for Teachinz 
BIOLOGY & ZOOLOGY 
and for Museums 
Lists on Application 
EDWARD GERRARD & SONS 
Osteologist: and Taxidermists, 
NATURAL HISTORY STUDIOS 
61, College Place, 
Camden Town, London. 
NOTICE.—Advertisements and business letters for 
monications to the Editor. 
| 
| 
| 
| 
| 
“Nature” should be addressed to the Publishers ; Editorial Com- 
The telegraphic address of ** Nature” is *‘ Phusis,”’ London. 
48 Sydney Street, Fulham Road, South Kensington, London, $.W. 
WEINE RALS. 
CHALYBITE, 
PSEUDOMORPH afier BARITE, 
From Virtuous Lady Mine, Tavistock, Devonshire. 
On view and sale with other choice Minerals at 
THOMAS D. RUSSELL’S, 
11 JOHN STREET, THEOBALD’S ROAD, LONDON, W.C. 
(Theobald’s Road is the first turning on the left in Gray's Inn Road, 
from Holborn.) 
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. 
Telegrams: 
‘* Meteorites,’’ London. Telephone: 2841 Western. 
Telephone—Gerrard, 8830. 
SUBSCRIPTIONS TO “NATURE.” 
PSs tt To all Places Abroad :— 4 3s @, 
Yearly s = = = im L180 Yearly = o ae nee ~ 1 10 6 
Half-yearly (26 Numbers) ~~ 0 14 6 Half-yearly (26 Numbers) O15, 16 
Quarterly (13 Numbers)... 0) 7 6 Quarterly (13 Numbers)... ~ 0 8 O 
(A charge of 6d. is made for changing Scotch and Irish Cheques.) 
Cloth Cases for binding “Nature” are issued at is. 6d. each, and can be sent post free for ls. 9d. 
NET CHARGES FOR ADVERTISEMENTS. 
ite cram 
. £ eS eis 
ae Lines in Column ahs 2 6 One Sixth Page, or One Third Col. 1 7 0 
er Line after .. ae aes aaa 7 0, O49 Quarter Page, or Half a Column 115 0 
One Sixteenth Page, or Eighth Col, 0 10 0 Half a Page, or a Column 3 50 
One Eighth Page, or Quarter Col... 0 18 6 | Whole Page Foo tae coe gee CC CG 
* Lines in heavy type are charged for as Two Lines. - 
For the re-direction of replies to advts. a charge of 3d. per advt. is made. 
Cheques and Money Orders Should be Crossed and made payable to MACMILLAN & CO., Limited. 
OFFICE: ST. MARTIN’S STREET, LONDON, W.C. 
