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



THE IVES ALTITUDE MAP 



Aid in the Study of Geology. 



THE IVE 



ly exhibits Superposition, d, 



THE IVE5 STRATA MAP 



graphically exMl .union, and outcrop of strata, w 











fit tK. 















WF 





iS^* '" ^'^^^ss^^^ jr . 



^^ am ^ m *^s^^BgBB^Sm=£il 





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



OPINIONS OF EMINENT AUTHORITIES. 



Further^ . ' ^ 0f8 ^appa^tus." " 



JAME5 T. B. IVES, 

 Office of the American Naturalist, 



518 Minor Street, Philadelphia, Pa. 



