I Weather forecasting a certainty 



WITH DAVIDSON'S 



OLD DUTCH WEATHER GLASS 



More sensitive tlian ttie 

 most perfect barometer. 



The water will rise in the spout as bad 

 weather becomes likely, falling for fine 

 weather. 



Price 1216 : or post free in 

 U.K., 1416, abroad, 1716. 



•' Nothing disturbed its accuracy, and 



its possession saved me many otlier- 



wise anxious hours at sea." — Capt. 



•Kessler in Nautical Magazine. 



F. DAVIDSON & Co.. 



29, GT. PORTLAND STREET, LONDON, W.l. 



WATKINS & DONOASTER 



NATURALISTS. 

 3G, STRAND, LONDON, W.C. 



(Fir* Doori from Charing Croit), 



Keep in 5toclc every description of 



APPARATUS, CABINETS, BOOKS, AND SPECIMENS 



for Collectors of 



BIRDS' EGGS, BUTTERFLIES, MOTHS, ETC. 



Catalogue (96 pages) sent post free on application. 

 TO ZOOLOGISTS. 



Wr ff DOd^lMRITIH^ IMPORTER OF EXOTIC 

 • '■ ' **• •IVvFCJlJilllJljll.O, ZOOI^OOICAL SPECIMENS 



57 Haverstock Hill, London, N.W.3, England. 



Begs to announce the publication of a new Price List of Birds' Eggs, 

 including over 900 species from all parts of the world. 



This List will be mailed free on application, as will any of the follow- 

 ing : — Mammals (400 species), Reptiles, Batrachians and Fishes (500 species) , 

 Lepidoptera (8000 species) . 



Largest stock of Birdskins in the world. A new Price List of these is 

 in preparation. 



All Museums, public or private, should write for these Lists. 



All specimens sent on approval. 



Please state which Lists arc required, and give name of this periodical. 



Printed at Browns' Savilk Press, 40 Geofsre Street, Hull, and published by 

 A. Brown & Sons, Limited, at j Farringdon Avenue, in the City of London. 



Feb. ist, 1921. 



