THE GUIDE TO NATURE— ADVERTISEMENTS 
XIII 
There’s density and definition; detail in 
high lights and shadows; correctness of 
perspective; color value — consider all 
these. For the negative can show only 
what the lens throws upon it. And any 
picture worth taking at all is worth tak- 
ing as well as it can be taken. In other 
words, take it with one of the 
BAUSCH & LOMB 
PHOTOGRAPHIC LENSES 
In poor light — cloudy or rainy outdoors, 
on porches or indoors — good snapshots 
— better than many a time exposure — can 
be made easily through Bausch & Lomb 
Tessar Anastigmats (Ic, f:4.5 or lib 
f:6.3). And in bright sunlight they stop 
the fastest action blurlessly. 
Ask your dealer to put Tessar 
Ar.asitigmat on your camera. 
Then you will see how pleasur- 
able photgraphy can be. 
Bausch & Lomb Optical (5. 
NEW YORK WASHINGTON SAN FRANCISCO 
CHICAGO ROCHESTER. N. Y. London 
Leadng American Makers of Photo- 
graphic Lenses, Microscopes, Projection 
Apparatus (Baloptcons), Ophthalmic 
Lenses and Instruments, Photomicro- 
graphic Apparatus, Range Finders and 
Gun Sights for Army and Navy, Search- 
light Reflectors, Stereo-Prism Binoculars, 
Magnifiers and Other High Grade Optical 
Products. 
Color Cards and Descriptive Literature re- 
lating to our Paint, Enamels, Stains, and Var- 
nishes will be gladly sent in response to in- 
quiries addressed to our Home Office 
FULTON AND CLINTON STREETS 
Brooklyn New York 
Can You Find “Tongues in Trees, 
Books in Running Brooks, 
Sermons in Stones, and GOOD IN 
EVERYTHING?” 
YOU CAN IF YOU READ 
Published Monthly, in Co-operation 
with The Cleveland Bird Lovers’ 
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Study and Preservation of Our Wild 
Birds and a 
WHOLESOME RESPECT 
FOR ALL OUTDOORS. 
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Sample Copy on Request 
Subscription Price: $ 2.00 Per Year. 
THE 
BLUE BIRD MAGAZINE, 
1010 Euclid Ave., Cleveland, Ohio. 
