Hills, Valleys and Plains of the U. S. 
THE IVES ALTITUDE MAP 
is a novel device by the inventor of nm " T Map” differing from any elevation map 
previously po shed, the ro ey a being carefully embossed to represent the pre ee 
and Mountain Prominence ilst successive altitudes are vical wr by strongly con- 
rent colors. The Map i is beautifully gotten up, framed in oak and varnished. 
SIZE 33 X 23 INCHES. PRICE hint 
Aid in the Study of Geology. 
THE IVES STRATA MAP 
graphically aeri ka agai denudat: and outcrop of strata, with the phenomena 
of escarpments, outl liers, dip, strike, pe Balad i etc., and the Cards may be bent 
to show syzclinad or iial folds. 
ADVERTISEMENTS. 
u ; 
LE OEE: 
Size, 30 x 24 inches. Price, $17.50. 
JAMES T. B. IVES, F. G. S: 
Is the venti of the Method of Construction an d the Sa ientific Data have been derived 
y him ne areas A asing _ Information. Dia and oe Awarded 
of these Maps a o World's Columbian Expos 
OMNONS OF EMIN ENT AUTHORITIES. 
Pro: r E. D. Cope, of the University of Pen nnsylvania, writes: “Useful to the student of 
topography et gooiogy, The map indicating elevations in relief is an important aid to the strati- 
gra map- 
“Wherever American geol ogy is taught your map should 4 part of “thes appa 
Further  partlonlars and Testimonials on application 
JAMES T. B. IVES, 
Office of the American Naturalist, 
518 Minor Street, Philadelphia, Pa- 
