47 
Relief map of Carmel Bay, California, showing a submarine 
walley. 
Geological relief map of Vesuvius and Monte Somma. 
Relief map of the Drainage basin of the Arkansas river in 
Colorado, showing the relations of the catchment basins to the 
reservoir sites and irrigable lands. 
Relief map of Europe. Horizontal scale, 85 miles to 1 
inch. Vertical scale, 45 times the horizontal. 
Relief map of Asia. Horizontal scale, 216 miles to 1 inch. 
Vertical scale, 39 times the horizontal. 
Relief map of Africa. Horizontal scale, 184 miles to 1 inch. 
Vertical scale, 53 times the horizontal. 
Relief map of North America. Horizontal scale, 140 miles to 
1 inch. Vertical scale, 39 times the horizontal. 
Relief map of South America. Horizontal scale 147 miles to 
1 inch. Vertical scale 30 times the horizontal. 
The foregoing maps enable one to study to advantage the 
great features of continental relief. Among those that may be 
noted are— that the continents in general have elevated mountain 
borders and a low or basin-like interior; that the highest border 
faces the larger ocean ; that the lines of greatest elevation are 
placed outside the center; that all the gentle slopes descend 
toward the Atlantic and the Frozen Ocean, all the steep ones 
toward the Pacific and Indian Oceans ; that the elevations go on 
increasing from the poles to the tropics. 
Relief map of the United States. Horizontal scale 85 miles 
to 1 inch. Vertical scale, 36 times the horizontal. 
Relief map of the United States. Horizontal scale, 1 :2,500,' 
000, Vertical scale exaggerated 10 times. 
Geological map of Canada. Colored to show formations. 
Physical map of the British Isles. 
Geological map of Russia. 
Geological map of the State of Illinois. 
Series of four maps showing the successive stages in the 
recession of Lake Chicago, following the Glacial Period, and the 
development of the Chicago plain. Former beach lines, spits and 
islands are well marked by the topography. 
Relief map of Northwestern Illinois, including Cook, Du 
Pap, Will and eighteen adjoining counties. The course of the 
Chicago Drainage Canal is shown. 
