UW EOT AEE 
Hills, Valleys and Plains of the ww. S. 
THE IVES ALTITUDE MAP 
is a novel device by the inventor of the “Strata Map” differing from any elevation map 
previously Sablished, th the sur p rg carefully embossed to — the River Systems 
and Mountain Prominences, whilst successive altitudes are emphasized by strongly con- 
trasted colors. The Map is  peutifully gotten up, framed in oak Sai varnished. 
SIZE 33 X 23 INCHES. PRICE $9.50. 
Aid in the Study of Geology. 
THE IVES STRATA MAP 
hically exhibits weren: ert ion, and outcrop of strata, with the phenomena 
E d enn Big outliers dip, strike, Sor maT, etc., and the Cards may be bent 
to show airy or anticlinal ‘tol lds. 
Size, 30 x 24 inches. Price, $17.50. 
JAMES I. B. IVES, F. G. S; 
Is the Inventor of the Method of Construction and the Scientific Data have been derived 
by him m Government Sources of sag “vbr ages Diploma and i org Awarded 
each of these Maps at the World’s Columbian Expositio 
OPINIONS OF EMINENT AUTHORITIES. 
opr, of the University of Pen nsylvania, writes: “Useful to the student of 
emp indicating elevations i in relief is an important p to the strati- 
graphic map—both together elucidate eye of the student.” 
President D. C, Gin > hid Sedes s Hopkins University, writes in reference to the Strata Map: 
“Wherever American geolog wajit yo peisan He ie nag" sn ne of the apparatus 
Further particulars ram finan on appl 
JAMES T. B. IVES, 
Office of the American Naturalist, 
518 Minor Street, Philadelphia, Pa. 
