THE GUIDE TO NATURE-ADVERTISEMENTS 
XV 
An Artists' Drawing Crayon 
The box pictured contains 
24 crayons of the very best 
quality. 
Students 
-py PENS' 
I GraY.O L'p 
s ARTISTE jCRAWN 
n || |I 1 \ f 
For artists and 
of Nature, to be 
used for 
sketching and 
general color 
work. 
“Crayola” is 
put up in all de- 
sirable styles 
of packing, 6 
to 24 colors in 
a box. 
Color charts and 
catalog on request. 
BINNEY & 
SMITH CO., 
81 Fulton St., 
New York. 
BEGIN THE NEW YEAR 
RIGHT! 
Of all the anastigmat lenses, none has 
surpassed the famous GOERZ DAGOR 
F/ 6 . 8 . No matter how exacting the 
photographic requirements have been, the 
GOERZ DAGOR has met them with pro- 
nounced success. Its covering-power, 
definition, brilliancy and workmanship 
are famous throughout the world. 
Few lenses enjoy the popularity of the 
GOERZ DOGMAR F/4.5 convertible 
anastigmat — three lenses in one. Its suc- 
cess has been phenomenal because of its 
speed, definition, brilliancy and convert- 
ibility. 
Call at your dealer’s and learn all about 
GOERZ LENSES and GOERZ QUAL- 
ITY. Begin the New Year right — get 
that “better lens” to-day! 
C. P. GOERZ AMERICAN OPTICAL 
COMPANY 
317 G East 34th Street,, New York City. 
Color v^ards and Descriptive Literature re- 
lating to our Paint, Enamels, Stains, an d Var- 
nishes will be gladly sent in response to in- 
quiries addressed to our Home Office 
FULTON AND CLINTON STREETS 
Brooklyn New York 
T £IE BRYOLOGIST — The only magazine in the Eng- 
lish language devoted wholly to articles dealing with 
Mosses, Hepatics, and Lichens. Of interest to be- 
ginners and advanced students alike. Bimonthly, pub- 
lished by the Sullivant Moss Society, an organizatioa 
for mutual help in moss study. Special curator* to 
assist beginners. Membership fee, $1.50 per year, in- 
cluding the Bryologist; subscription alone, $1.25; Cana- 
dian postage 10 cents extra. Address Edward B. Chaat- 
berlain, 18 West 89th 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 
