THE GUIDE TO NATURE— ADVERTISEMENTS 
XV 
An Artists' Drawing Crayon 
The box pictured contains 
24 crayons of the very best 
quality. For artists and 
Students of Nature, to be 
used for 
sketching and 
general color 
“Crayola” is 
put up in all de- 
sirable styles 
of packing, 6 
to 24 colors in 
a box. 
Color charts and 
catalog on request. 
Now in Three Sizes 
GOERZ 
Rollfilm 
Tenax 
(l'/l s 2^ inches ) 
(2% x 3 \\ inches ) 
(i'/s x 454 inches) 
We have just 
added a new size 
(3’/i x 4J4) in this 
compact and light 
hand camera. Each 
has the same novel 
features and high 
grade construction 
that has made the 
Tenax so popular. 
But whatever the size, you are assured of brilliant, 
sharp pictures, for the lenses used are either the 
Goerz Anastigmat Dogmar F:4.5, Dagor F:6.8 or 
the Tenastigmat F:6.3. Enlargements up to 8x10 
can be made without loss of satisfactory definition. 
The Compur Shutter gives speeds from 1 second up 
to 1/250 second, with time and bulb. 
Ask your dealer to show you these high grade 
cameras . If he hasn't them , write us. 
C. P. Goerz American Optical Company 
317 G EAST 34TH STREET, NEW YORK CITY. 
An Advertising Artist. 
Some men never let an opportunity 
slip. They make the most of every 
chance, as, for instance, a certain organ- 
grinder who once played his organ out- 
side the house of Mascagni, the famous 
composer. Mascagni is often driven 
wild by hearing his music “murdered” 
on piano-organs, and on this occasion 
he left his house and interviewed the 
street musician. He did not send him 
away. He merely took the handle of 
the instrument, turned it around faster, 
and quickened the time. The organ- 
grinder smiled his thanks. Next day 
he again appeared in the street. This 
time his organ bore a large placard on 
which was inscribed : “Pupil of Mas- 
cagni.” — The Argonaut (San Fran- 
cisco). 
The Apple Coats and Suits. 
One clothing merchant uses the apple 
as a trade-mark. He claims there 
wouldn’t have been any clothing busi- 
ness if it hadn’t been for an apple. — 
W ampus. 
T HE BRYOLOGIST — The only magazine in the Eng- 
lish language devoted wholly to articles dealing with 
Mosses, Ilepatics, and Lichens. Of interest to be- 
ginners and advanced students alike. Bimonthly, pub- 
lished by the Sullivant Moss Society, an organizatiom 
for mutual help in moss study. Special curators 
assist beginners. Membership fee, $1.50 per year, in- 
cluding the Bryoloeist; subscription alone, $1.25; Cana- 
dian postage 10 cents extra. Address Edward B. Cham- 
berlain, 18 West 89tb Street. New York City. 
AQUATIC LIFE monthly magazine will 
~ increase your enjoyment 
of the life in nature’s streams and in your home 
aquarium. Written by scientists to entertain all 
nature lovers who like to paddle in water and 
study its many forms of life. A journal of popu- 
lar aquatic biology, not merely a fish fanciers’ mag 
azine. Specimen copy free on request. Subscrip- 
tion, $1.25 per year. Joseph E. Bausman, Pub- 
lisher, 542 East Girard Avenue, Philadelphia. 
THE 
AMERICAN MICROSCOPICAL SOCIETY 
(Founded in 1878') 
Publishes Its TRANSACTIONS as a 
Quarterly Journal of Microscopic Research. 
For information, write to 
P. S. WELCH, Secretary 
ANN ARBOR. MICHIGAN 
Teacher — “Do you know the popula- 
tion of, New York?” 
“Not all of them, ma’am ; we’ve only 
lived here two years.” — The American 
Boy. 
