it ADVERTISEMENTS. 
Hills, Valleys and Plains of the U. S. 
THE IVES ALTITUDE MAP 
is a novel device by the inventor of rea “Strata Map” differing from any elevation 1 map 
oh eel ease! = surface being carefully embossed to represent the River Systems 
and Mou 1 Prominences, whilst successive altitudes are emphasized by strongly con- 
trated zt The Map i is beautifully gotten up, Gaiei in oak and varnished. 
SIZE 33 X 23 INCHES. PRICE $9.50. 
Aid in the Study of Geology. 
THE IVES STRATA MAP 
grap hically bears gh eps pn tion, and outcrop of strata, with the phenomena 
scarpments, outliers, inliers, dip, strike, Hacforiiabiliey, etc., and the Cards may be bent 
A koi smeny or pie pa folds. 
Size, 30 x 24 inches. Price, $17.50. 
Is bev levente of the Method of n s San 
m from Government Sources of Information. Dipteme ae a s resent e al 
each of these Maps at the World’s Columbian Exposition 
OPINIONS OF EMINENT ares ES. 
rofessor E. D, Cope, of the University of Pen ania, writes; “U 
f: : “ Useful to the student of 
topography pale geology. The a ting ele aia i pa relief is a pinpoint aid to the st trati- 
graphie map—both together elucidate the structure to the of the studen 
LAN, 
President i of ng Hy kins Valiants ey 
= in ara to the Strata Map: 
“ ver American geolog ught your map should a be 
her particulars an estimate 6 o pli ón m e 
n application t 
JAMES T. B. IVES, 
Office of the American Naturalist, | 
518 Minor Street, Philadelphia, Pa. 
