ADVERTISEMENTS. t 
Hills, Valleys and Plains of the U. S. 
THE IVES ALTITUDE MAP 
a novel device by the inventor of the “Strata Map” differing from any elevation map 
previously published, the anges ace ne carefully embossed to represent the River Systems 
Mountain Prominence uccessive altitudes are emphasized by strongly con- 
Seabee colors. The Map is D beautifully gotten up, framed in oak a varnished. 
SIZE 33 X 23 INCHES. PRICE $9.50. 
Aid in the Study of Geology. 
THE IVES STRATA MAP 
graphically exhibits Superposition, denudation, and outcrop of strata, with the phenomena 
of escarpments, outliers, iniiers, dip, strike, peter oy etc., and the Cards may be bent 
to show synclinal or anticlinal folds. 
Size, 30 x 24 inches. Price, $17.50. 
JAMES T. B. IVES, F. G. §. 
Is the Inventor of the Method of Construction and the Scientific Data hcg ei derived 
by him fron anche yes a Source A of infopunation. Diploma and Meda arded 
of these Maps at the World’s Columbian Exposition. 
OPINIONS OF EMINENT AUTHORITIES. 
Pr r E. D. Corr, na a grate oo of ete ania, writes: “Useful to the student of 
topo been pe geology. map indicating elevations in relief is an important aid to the strati- 
graphie map—both together resa ‘the structure to the a h na ar student,” 
President D. C. GILMAN, of Johns Hopkins Unive n reference to the Strata Map: 
“W yi er American geology is ta e your an n rhe e part of “the apparatus,’ 
Further particulars and Tes Epp A on application 
JAMES I. B. IVES, 
Office of the American Naturalist, 
51S Minor Street, Philadelphia, Pa. 
