vost acai gee M! NTS. 
Hills, Valleys and Plains of the U. S. 
THE IVES ALTITUDE MAP 
is a novel device by the inventor of the “Strata Map” differing from any elevation ey 
previously published, the oS ea being carefully embossed to represent the River System 
and Mountain Prominenc hilst successive altitudes are emphasized by strongly co 
trasted colors. The Map i is is beautifully gotten up, framed in oak mg varnished, 
SIZE 33 X 23 INCHES. PRICE $9.50. 
Aid in the Study of Geology. 
THE IVES STRATA MAP 
penu eae Superposition, denudat and ouéerop of strata, with the phenomena 
arpments, outliers, inliers, dip, strike, FOF, etc., and the Cards may be bent 
He vow sate or anecinat folds. 
Size, 30 x 24 inches! Peida., $17. 50. 
JAMES T. B. IVES, F. G. S: 
Is the g Peg of the keieren of Construction and the Scientific Data have pose eyed 
by ge yee t Sources of ay foe oe Diploma and Medal Aw: 
f these Maps at the World’s Columbian Exposition. 
OPIN IONS OF EMINE ENT AUTHORITIES. 
D. Corr, of the University of Pe ennsylvania, writes: “ Useful to the student of 
topography ala geology. The map indicating elevations in relief is ve im portant aid to the strati- 
raphie map—both together slois the meeeg to the eye of the st 
a President. D. ee GILMAN á we ns Hopkins University, writes in lass to the Strata Map: 
Bee 8 er American geolo ogy i taught you qim sa mg! en -eri of the apparatus 
rther partionlars and Testimonials on application 
JAMES T. B. IVES, 
Office of the American Naturalist, 
518 Minor Street, Philadelphia, Pa. 
