w ADVERTISEMENTS. 
The Ives Strata „? a° Altitude Maps 
F THE UNITED STATES AND PART OF CANADA. 
By al T B. Ives, F. G. Member of the American Institute of Mining Engineers, the American 
Association for pn Advancement of Science, and the Canadian Institute. 
THE STRATA MAP 
consists of a series of seven Superimposed Maps, rep- 
resenting the n Geologica Systems of the coun- 
try, colored as recommended by: the Internation 
gress of Geologists, portion 
with the a ‘of the seas systems in n nate 
It graphically exhibits superposition, denud- 
ation, and outcrop of strata, with the phenom- 
ena of escarpments, outliers, inliers, dip, strike, 
seg SENA etc., and the Cards may be bent 
show synclinal or anticlinal folds. 
THE ALTITUDE MAP 
is a novel device by the inventor of e “Strata Map” differing from any elevation map previ- 
ously published, pei penai being carefully embossed to represent the River See E 
Mountain Promine ust su sera apap a are emphasized by strongly contrasted colors, 
The Map is bea aliy gotten up, framed in oak and varnished, and arranged to han gonthe — 
wall or stand erect on the ta i 
The two Maps are pòntiinid in a neat cloth- peppa case, gilt lettered. 
Size, 21x15 inches. Price, $14. 
BINDER & KELLY, Publi Heber, 
AMERICAN N ATURALIST OFFICE, 
P. O. BOX 712. 1298, PHILADELPHIA, TU PA. 
I will pay cash or give hange fine fossils (My 
for a "Cellection of obits “Stamps or for old 
(entire) U. S. stamped envelopes, old stamps 
i ori e sts” 
nny po 
o st- P 
ers or “town ” stamps issued in Confederate Is THE BEST Sanitary publica- PA 
mast 
States in 1861, Any of which are worth more | 
F 
if left on original letter or envelope. For some Mines in America” (Mississippi Valley Medi 
etre stamps I will ay $25.00 each. \cal Monthly) ; “6 Easily maintains its 
m. F. E. GURLEY, Danville, Ilinois. superiority over all similar publi- 
———— lcations” (Medical World) $ and “ 
‘accomplished more good than all 
of the other Sanitary papers put t% 
gether id (Hydraulic and ‘Sanitary Plumbers 
“ The Editor, Dr. A. N. BELL, is well 
known to the mercantile community 
for his co-operation with the mer 
chants i in quarantine reform „andto 
his profession as a leader in Sanitary 
” (New Y: ork Journal of —_, 
P 
ar Inkalen 
9g" NORTH BROAD STREET, 
ILADELPHIA, PA. 
[Mention aces Naturalist. T 
H. H. & C. S. BRIMLEY, 96 PAGES TEXT MONTHLY; 
RALEIGH, N.C. TWO | VOLUMES 
Living Batrachians diving the winter. 
Embryos and other Histol ic 1M “Sample 
8 yi s $4.00 a year, in advance; 35 cts. @ Numbi a 
raji Main E copies, 20 cts. (ten two-cent postag' i 
mra mmal shine, with skulls. KÆ All communications should be addressed 
rices on application 293. the Editor, Brooklyn, N. Y. © 
