A dvertisements. 
v 
DALLMEYER’S 
PORTABLE TELESCOPES. 
For Power, Durability, and Compactness, far excel any Binocular 
made. The No. 2 size, 
magnifying 17 diameters, 
measures only 6J in. long 
by 1J in. diameter. Price, 
including case, £3 5s. 
Larger sizes in stock up 
to 50 diameters. 
DALLMEYER’S 
PHOTOGRAPHIC LENSES & CAMERAS for Travellers. 
Send for Illustrated Catalogue. 
CAMERAS BUILT TO SUIT INDIVIDUAL 
REQUIREMENTS. 
TELEPHOTOGRAPHIC LENSES 
and ATTACHMENTS. 
Indispensable for Mountain Work. 
Invaluable to Naturalists. 
Any good lens working at an intensity of not less than F /8 can be 
converted into a Telephoto Lens without impairing it for its ordinary use. 
ESTIMATES AND ADVICE FREE. 
J. H. DALLMEYER, LTD., 25, NEWMA N ST., LONDON, W . 
[To face last p.'of Index. 
