ADVERTI SEMEN TS. 
Hills, Valleys and Plains of the U. S. 
THE IVES ALTITUDE MAP 
is a novel device by the inventor of the —— Map” differing from any elev sion map 
previously Published, a sig ce ele carefully embossed to represent the River Systems 
and Mountain Prominen ilst successive altitudes are =. eal by veda A con- 
trasted arera The Meri is ; beantifally gotten up, framed in oak and varnished. 
SIZE 33 X 23 INCHES. PRICE $9.50. 
Aid in the Study of Geology. 
THE IVES STRATA MAP 
Se saad exhibits ore angie ——— m, and outcrop of strata, with the phenomena 
of escarpments, outlier dip, strike, pect etc., and th 1e Cards may be bent 
to show Haal or EMAI folds. 
Size, 30 x 24 inches. Price, $17.50 
JAMES T. B. IVES, F. G. S. 
Is the Inventor of the Method of Construction and the Scientific Data have been derived 
by him irom Gar sara Sources of information. Dipioma and rg Awarded 
of these Maps at the World’s Columbian Expositio 
OPINIONS OF EMINENT AUTHORITIES. 
Pro r E. D. Core, of the University of Pennsylvania, writes: “Useful to the student of 
topography and geology. The map indicating elevations in relief is an ‘important aid to the strati- 
raphi —both together elucidate the structure to the eye of the ne ent 
Pre A oe sd M of Johns Hopkins University, n reference > the Strata Map; 
Pajarre lyan n geology is ae t you on = should be aa of the appa 
a AMES 1. B. IVES, 
: Office of the American Naturalist, 
518 Minor Street, Philadelphia, Pa. 
