ADVERTISEMENTS, 
Hills, Valleys and Plains of t the he U. § S. 
THE IVES ALTITUDE MAP 
is a novel y publi by the inventor of the “Strata Map” di iffering from any elevation = 
sa se 
SIZE 33 X 23 incues. PRICE ius. 
Aid in the wi of Geology. 
THE IVES STRATA MAP 
graphically oe Superposition, ETA n, and outcrop of strata, with the phenomena 
of escarpments, outliers, iniiers, dip, strike, pad mim A etc., and the Cards may be bent 
to show paman or anticlinal folds. 
Size, 30 x 24 inches. Price, $17.50. 
JAMES T: B. IVES, F. G. S. 
of Const, 
= The ma g relief is an anak t aid to the anik 
ps hy ort together sce ties rat to thee eye of the stud apo 
AN, 0 hns Hopkins Universit t f he Strata Map: 
e Wiio p ee i p y, writes in reference to the Stra 
n geology is tau; ht ur map sh 
Further r particulars and Testim le on applicat “ts Ae pad oS 
JAMES T, B. IVES, 
Office of the American Naturalist, 
518 Minor Street, Philadelphia, Pa. 
