33 
No. 2. — Relief map of Europe. Horizontal scale 85 miles to 
I inch. Vertical scale 45 times the horizontal. 
No. 3. — Relief map of Asia. Horizontal scale 216 miles to 
I inch. Vertical scale 39 times the horizontal. 
No. 4. — Relief map of Africa. Horizontal scale 184 miles to 
I inch. Vertical scale 53 times the horizontal. 
No. 5. — Relief map of North America. Horizontal scale 140 
miles to i inch. Vertical scale 39 times the horizontal. 
No. 6. — Relief map of South America. Horizontal scale 147 
miles to i 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 moun- 
tain borders and a low or basin-like interior; that the highest bor- 
der 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 increas- 
ing from the poles to the tropics. 
No. 7.— Relief map of the United States. Horizontal scale 
85 miles to i inch. Vertical scale 36 times the horizontal, 
No. 8.— Relief map of the United States and the Gulf of 
Mexico, modeled on a section of a globe 16^ feet in diameter. 
Horizontal scale, -i inch equals 4 miles. Vertical scale, i inch 
equals 8 miles. 
Note that the true outlines of the continent extend much be- 
yond the present coast line and properly include the West 
Indies. 
No. 9.— Relief map of Massachusetts, from maps of the 
United States Geological Survey and the Topographic Survey of 
Massachusetts. Horizontal scale, i inch equals 4 miles. Verti- 
cal scale, I inch equals 4,000 feet. 
No. 10.— Relief map of Connecticut from maps of the United 
States Geological Survey and the Topographic Survey of Con- 
necticut. 
No. 11.— Relief map of Northwestern Illinois including Cook, 
Du Page, Will and eighteen adjoining counties. The course 
of the Chicago Drainage Canal is shown. 
