THE GUIDE TO NATURE— A OVERT IS EM ENTS 
XIII 
dod hous^ ren A SLIMMER 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 Book 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 
of rocks, some containing shells, bones, 
etc. The specimens would receive 
careful study and every one would be 
talking about them. It is all too true 
that familiarity breeds contempt, and 
if the only stones on the earth were 
those which came out of the sky like 
meteorites, geology would be much 
more popular. 
“The Strange Adventures of a 
Pebble” would then be a highly in- 
teresting subject. I was disappointed 
to find that the book under this title 
does not treat of the history of a pebble, 
but rather of the earth. Somewhere I 
have read the story of a lead pencil, 
how the graphite was taken from the 
mine and made into a pencil. The title 
of this book led me to think that the 
author had written a similar story of a 
pebble, how it had been worn out of 
the strata and perhaps transported by 
a glacier or otherwise to its present 
position. I imagine that some green 
and red sandstone pebbles which I 
picked up as I passed a railroad track 
while out “naturalizing” the other day 
could tell a remarkable story of their 
adventures since they were cut out of 
nature’s warehouse of rock. 
What will the 
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 lib 
f:6.3). And in bright sunlight they stop 
the fastest action blurlessly. 
Ask your dealer to put Tessar 
Anasitigmat 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. 
