Ww ADVERTISEMENTS. 
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 map 
ponar ap shed, the agar peng carefully embossed to represent the River Systems 
and Mot n Prominence uccessive altitudes are emphasized by strongly con- 
vette solr: The Map i is beautifully gotten up, framed in oak aad varnished, 
SIZE 33 X 23 INCHES. PRICE $9.50: 
Aid in the Study of Geology. 
THE IVES STRATA MAP 
graphically gaa? aga eggs ier a ton, and outcrop of strata, with the phenomena 
of escarpments, outi iers, dip, strike, EMAS, etc., and the Cards may be bent 
to show syzciinal or eaii 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 care 
y him from ile ert Sources of Fiorina tion. Basten: and Medal Awarded 
ese Maps at the World’s Columbian Exposition. 
OPIN! 10NS OF EMINENT AUTHORITIES. 
Professor E. D. Corn, of the University of Pennsylvania, writes: “Useful to the student = 
topography » and geology. The map indicating oa. in relief is an te aid to the strati 
graphic map—both together elucidate the structure to the eye of the stu e 
cae resident D. MS GILMAN, of Labus Hopkins Un fiakr dh writes in staan to the Strata Map 
Batra rio n geology is taught your map s gong ija — of the apparatus, 
Further e particulars and Testimonials on application 
JAMES T. B. IVES. 
Office of the American Naturalist, 
518 Minor Street, Philadelphia, Pa- 
