THE GUIDE TO NATURE— ADVERTISEMENTS 
XV 
dod hous^ ren A SIMMER HOME ! 
4 compartments, 28 All song birds raise two, and 
inches high, 18 inches usually three, broods of young 
in diameter. each year, selecting a new nest- 
ing site for each brood of young, 
so if your houses are put out 
now they are sure to be occupied. 
DODSON HOUSES 
win the birds. Built by a bird- 
lover who has spent a lifetime 
studying their habits and how to 
attract them to beautiful Bird 
Lodge, his home on the Kan- 
kakee River. 
Free Bird BopK sent on re- 
quest. illustrating Dodson Line, 
giving prices; also beautiful col- 
ored bird picture free. 
JOSEPH H DODSON 
Pres. American Audubon Ass’n. 
714 S. HARRISON AVE., 
KANKAKEE. ILL. 
Dodson Sparrow Trap guaranteed to rid your community 
of these quarrelsome pests. Price $8.00. 
Girl Scouts camp, hike and live close to 
Nature. Read about their good times in 
THE AMERICAN GIRL 
A Magazine for Girl Scouts and Girls 
who love Scouting. 
The American Girl will bring you suggestions 
for parties — stories and other things besides. 
Send for sample copy to 
THE AMERICAN GIRL 
189 Lexington Avenue, New York City. 
$1.50 a year — Single copy 15c 
FEED THE BIRDS 
THE PACKARD 
Automatic Food-House 
KEEPS THE FOOD DRY; AVOIDS WASTE; 
LASTS YEARS; AND COSTS 75c. 
Two for $1.25 — Why Pay More? 
by mail, postpaid in New England; 
elsewhere add postage. 
Special Mixture Bird Food 
A balanced ration; best for the birds, 
best for use in the food-house. 
8 lbs. for $1.25, postpaid in New 
England. Elsewhere add postage. 
Everything for Wild Birds. Catalog Free. 
Address WINTHROP PACKARD 
Canton, Mass. 
What will tie 
negative slow? 
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 1 1 b 
f:6.3). And in bright sunlight they stop 
the fastest action blurlessly. 
Ask your dealer to put Tessar 
Anas.tigmat on your camera. 
Then you will see how pleasur- 
able photography can be. 
Bausch & Lomb Optical (5. 
NEW YORK WASHINGTON SAN FRANCISCO 
Chicago ROCHESTER. N- Y. London 
Leading American Makers of Photo- 
graphic Lenses, Microscopes, Projection 
Apparatus (Balopticons), 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. 
