Hills, Valleys and Plain s of the 11. S. 
THE IVES ALTITUDE MAP 
is a novel device by the inventor of the “ Strata Map ” differing from any elevation map previously 
published, the surface being carefully embossed to represent the River Systems and Mountain 
Prominences, whilst successive altitudes are emphasized by strongly contrasted colors. The Map 
is beautifully gotten up, framed in oak and varnished. 
SIZE 33X23 INCHES. PRICE, $9.50. 
Aid in th e Study of Geology. 
THE EVES STRATA MAP 
graphically exhibits Superposition, denudation , and outcrop of strata, with the phenomena of 
escarpments , outliers, inliers, dip, strike, conformability, etc., and the cards may be bent to show 
synclinal or anticlinal folds. 
SIZE, 30X24 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 from Government Sources of Information. Diploma and Medal 
Awarded to each of these Maps at the World’s Columbian Exposition. 
OPINIONS OF EMINENT AUTHORITIES. 
Professor E. D. Cope, 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¬ 
graphic map—both together elucidate the structure to the eye of the student.” 
President D. C. Gilman, of Johns Hopkins University, writes in reference to the Strata Map: 
“ Wherever American geology is taught vour map should be part of the apparatus.” 
Further particulars and Testimonials on application to 
JAIW1ES T. B. IVES, 
Care of the American Geologist, MINNEAPOLIS, MINN. 
