Rn: : ADVERTISEMENTS. 
The Ives Strata a Altitude Maps 
OF THE UNITED STATES AND PART OF CANADA. 
By JAMES T. B. IVES, F.G.S., member of the American Institute of Mining Engineers, 
"These Maps aid in teaching Physical Geography and Elementary Geology, in connection with 
the ordinary Text Books of those Sciences. The Strata Map consists of a series of seven Superim- 
pose aps, representing the seven Geological Systems of the country, colored as recommended 
by the International Congress of Geologists, portions being cut away agreeably with the distribution 
of the several systems in nature. The pe veral Cardboard Maps are ingeniously hinged together to 
admit of examination in detail. 
By means of the Strata Map superposition, denudation, and outcrop of strata are graphic ud 
exhibited, with the ess of escarpments, outliers, inliers, dip, strike, conformability, etc., an 
may be bent to show syzelinal or anticlina olds. levels, 
In “ Altitude Map. several layers of colore cardboard are cut to represent er e ith 
combining he advantages of the Colored Contr Map and = by elief Map. Both Maps ar 
mounted in oak rg pier the former is covered by glazed oak fra 
The two Maps are contained in a neat cloth-covered case, gilt lettered. 
Size 21x15 inches. Price $14. 
Some Institutions which have purchased the Strata Map (the Altitude Map is now first offered 
for sale Hopkins; 
IVERSITIES :— Harvard; Yale; Pennsylvania ; hg Cornell ; Johns | d ens 
California ; Ohio State; Syracuse; Toronto, Ontario; Victoria, Ontario; Kingston, On ord; 
Quebec. COLLEGES :—Princeton; Darmouth ; Columbia ; Upton ; Hami ton; Amherst; d. "Trinit 
City of New York; Girard, Philad Iphia; Wilson, Chambersburg; Adelbert, ames. e E 
oronto; McGill, Mon NSTITUTIONS, HIGH SCHOOLS, v Y. Hartford High 
ffalo Normal ool; Cortland Normal School; Washington High Schoo te, Brooklyn ; 
School ; Polytechnic Institute, Brooklyn; pie qn gs Brooklyn ; Packer Insite, Institute, 
Institute of Technology, Boston ; Academy of Natural Sciences, Philadelphia ; Milit itary Academy, 
Toronto; ‚Canadian Geological Survey; United Beatan Geological Survey; U. 5. 
West Point, N. Y. 
