Hills, Valleys and Plain s of the U. S. 



THE IVES ALTITUDE MAP 



s. The Map is 'bt?:mt ifu lly.i 



"Strata Map" di fieri njr fr-.m an 

 refully embossed to represent th< 

 ssive altitudes are emphasized I 

 tten up, framed in oak and varni 



Aid in the Study of Geology. 



THE IVRS^STRATA MAP 



JAMES T. B. IVES, F. G. S. 



OPINIONS OF EMINENT AUTHORITIES. 



JAMES T. B. IVES, 

 Office of the American Naturalist, 



518 Minor Street, Philadelphia. Pa. 



