XVI 
THE GUIDE TO NATURE— ADVERTISEMENTS 
Know What You See. 
Don’t just tramp the woods, with your eyes and mind shut to all that 
is going on around you. You’re losing half the fun. If you’re on the shore, 
pick up the beautiful shells. Read about them. Get to know them. They are 
as much a part of this wonderful world as you are. Know the birds and the 
fishes and the rocks. Know the butterflies and snails and, yes ! the snakes. 
Then you’ll really be alive. 
Books will help you do this. Collecting and study will help even more. 
When you’re really interested we’ll help you and make your collections 
complete. 
WARD’S NATURAL SCIENCE ESTABLISHMENT 
84-102 College Ave., Rochester, N. Y. 
MANUFACTURERS & DEALERS IN NATURAL SCIENCE SPECI- 
MENS AND COLLECTORS SUPPLIES 
Circular No. 21 1 (Free) lists all of our Catalogues. 
BIOLOGY — MINERALS — FOSSILS — BUTTERFLIES — BIRDS — 
MAMMALS — SHELLS 
and 
OUTFITS FOR COLLECTING EACH 
It yields comfortably to the shape of 
the body, is soft yet firm, and induces 
perfect relaxation and rest. The Oster- 
moor Mattress is scientifically built, not 
stuffed like horsehair: it cannot get out 
of shape and is sanitary. Replace with 
Ostermoor as your old mattresses be- 
come uncomfortable. 
At your dealer’s, or we will ship direct; 
express prepaid. Write for 144-page Cat- 
alog — mailed free. 
Ostermoor & Co., 114 Elizabeth St., 
New York. 
Canadian Agency: 
Alaska Bedding of Montreal, Ltd., Montreal 
A SQUARE MEAL 
for your DOG and a square deal for 
your POCKETBOOK 
If you feed Spratt's Dog Cakes 
and Puppy Biscuits. 
Over Half a Century 
of Square Dealing 
Has Built Up For Us 
the Largest Business 
of Its Kind in the 
World. 
Write for samples and send 2 c stamp for 
“DOG CULTURE” 
SPRATT’S PATENT LIMITED 
Newark, New Jersey 
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