ADVERTISEMENTS. 
The Ives Strata » Altitude Maps 
OF THE UNITED STATES AND PART OF CANADA. 
By James T. B. Ives, F. G. S., Me 
mber of the American Institute of Mining 
Engineers, the American 
Association for the Advancement of Science, and the Canadian Institute. 
THE STRATA MAP 
consists of a series of seven Superimposed Maps, rep- 
E e seven Geological pyrene of the — 
ry, C 
gu of Geologists, porna being cut away see 
he several systems in nature 
It a SOS exhibits "ai ears denua- 
crop of strata, with t 
a of nate outliers, inliers, go strike, 
confor mability, etc., and the Cards may be bent 
to show Siamo or ches folds. 
ation, and oz. e phenom- 
THE ALTITUDE MAP 
is a novel device by the ToS of 
ously qus sti ma surla 
Mounta 
Ma E is rec atiaj gn ip T fra 
wall or stand erect on the 
the ** Strata Ma 
dis eing carefully embo 
ccessive altitudes are emphas 
ned in oak and varnished, and arranged to hang 
p" differing from any elevation anid pe 
ssed to represent the River Syste «d 
asized by strongly contrasted le 
on the 
The two Maps are veri in a neat ar bare a case, gilt lettered. 
Siz 
e, 21x15 inches. 
Price, 
4.00. 
BIN DER & KELLY, Publishers, 
AMERICAN NATURALIST OFFICE, 
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