ADVERTISEMENTS. 



WATSON'S HOLOSTIGMAT LENSES 



(Watson-Conrady System) 



For Successful 



Bird 

 Photography. 



The Holostigmat is a genuine convertible Anastigmat ; that is, one in which the single components 

 are perfectly corrected for use, separately, as Lenses of long focus. The constituents of these com- 

 ponents are cemented together, instead of, as in so many Lenses, being mounted with air spaces. 



False reflections are consequently avoided, and Negatives taken with the Holostigmat possess, in 

 a special degree, crispness of detail, and are entirely free from haze. 



For Bird Photography we recommend Series IA H*6 and Series I, f.6-1. 



Tele-Negative Lenses of either High or Moderate Power are supplied for use with the above. 



List of Lenses sent on Application to 

 W. WATSON & SONS, Ltd., 313, HIGH HOLBORN, LONDON, W.C. 



SECOND EDIT/ON. 



The Home- Life of a Golden Eagle 



Photographed and Described by H. B. MACPHERSON. 



31 full-page Plates, artistically mounted. Crown 4to. 



Special limited edition, Half-bound Leather, 10s.6d.net. 

 Stiff Paper Cover*, 5s. net. Cioth 6s. net. 



Orni hologUts, Photographers, the Press, and the Public have been unanimous in their 

 5 Works. 



praise of these 



Uniform with the above. 



The Home- Life of the Spoonbill 



THE STORK AND SOME HERONS. 



Photographed and Described by 

 BENTLEY BEETHAM, F.ZS. 



A beautiful book of wonderful Photographs and interesting: Letterpress. 32 full-page 

 Plates, artistically mounted. Crown 4to. 



Special limited edition, Half-bound leather, ios. 6d. net. Cloth, 5s. net. 



London : WITHERBY <& Co., 326, HIGH HOLBORN. 



