Page:Popular Science Monthly Volume 46.djvu/500

This page has been validated.
484
THE POPULAR SCIENCE MONTHLY.

This arises mainly from defective work in the earlier years of the survey, when men and methods were more or less on trial, and from the demand for more detailed and accurate maps on which to plat the geology of the coal and iron regions of the Appalachians, and the gold, silver, iron, coal, and artesian areas of other sections of the country:

Area
surveyed,
sq. miles.
scales. Per cent
of total
area
surveyed.
1/62,500 1/125,000 1/250,000
Alabama 15,870 . . . . . . 15,000 . . . . . . 30
Arizona 41,000 . . . . . . . . . . . . 41,000 36
Arkansas 15,000 . . . . . . 15,000 28
California 35,100 4,000 16,700 14,400 22
Colorado 36,000 1,500 34,500 . . . . . . 35
Connecticut 4,990 4,990 . . . . . . . . . . . . 109
Delaware 15 15 . . . . . . . . . . . . 1
District of Columbia 70 70 . . . . . . . . . . . . 100
Florida 1,900 1,900 . . . . . . . . . . . . 3
Georgia 15,275 . . . . . . 15,275 . . . . . . 26
Idaho 12,000 . . . . . . 12,000 . . . . . . 14
Illinois 3,875 3,875 . . . . . . . . . . . . 7
Indiana 20 20 . . . . . . . . . . . . . .
Indian Territory 250 . . . . . . 250 . . . . . . 1
Iowa 4,450 4,450 . . . . . . . . . . . . 8
Kentucky 12,800 . . . . . . 12,800 . . . . . . 32
Kansas 67,385 . . . . . . 67,385 . . . . . . 82
Louisiana 7,000 7,000 . . . . . . . . . . . . 14
Maine 4,200 4,200 . . . . . . . . . . . . 13
Maryland 6,930 3,000 3,930 . . . . . . 57
Massachusetts 8,315 8,315 . . . . . . . . . . . . 100
Michigan 231 231 . . . . . . . . . . . . . .
Minnesota 850 850 . . . . . . . . . . . . 1
Missouri 26,000 300 25,700 . . . . . . 37
Montana 14,400 . . . . . . 6,000 8,400 10
Nebraska 14,300 . . . . . . 14,300 . . . . . . 18
Nevada 19,980 . . . . . . 5,580 14,400 18
New Hampshire 1,990 1,990 . . . . . . . . . . . . 21
New Jersey 7,815 7,815 . . . . . . . . . . . . 100
New Mexico 27,800 . . . . . . 10,000 17,800 23
New York 10,000 10,000 . . . . . . . . . . . . 20
North Carolina 11,110 . . . . . . 11,110 . . . . . . 21
North Dakota 4,960 . . . . . . 4,960 . . . . . . 7
Ohio 50 . . . . . . 50 . . . . . . . .
Oklahoma Territory 3,423 . . . . . . . . . . . . . . . . . . 9
Oregon 13,180 . . . . . . 980 12,200 14
Pennsylvania 6,537 6,537 . . . . . . . . . . . . 14
Rhode Island 1,250 1,250 . . . . . . . . . . . . 100
South Dakota 9,800 . . . . . . 9,800 . . . . . . 13
Tennessee 19,000 . . . . . . 19,000 . . . . . . 45
Texas 57,000 . . . . . . 57,000 . . . . . . 21
Utah 6,000 . . . . . . . . . . . . 6,000 7
Vermont 2,175 2,175 . . . . . . . . . . . . 23
Virginia 32,120 1,120 31,000 . . . . . . 84
Washington 450 450 . . . . . . . . . . . . 1
West Virginia 22,500 . . . . . . 22,500 . . . . . . 90
Wisconsin 6,540 6,540 . . . . . . . . . . . . 12
Wyoming 7,700 . . . . . . 7,700 . . . . . . 8
  624,016 94,793 427,163 102,060
Per cent of all . . . . . . 15 68 17