Topographic sheets. Pennsylvania, Allentown sheet, lat. 40°30′-40° 45′, long.75° 15′-75° 30′. Scale 1:62,500, contour interval 20 ft.
Publication Title:
Pennsylvania, Allentown sheet, lat. 40°30′-40° 45′, long.75° 15′-75° 30′. Scale 1:62,500, contour interval 20 ft.
Display Title:
Topographic sheets. Pennsylvania, Allentown sheet, lat. 40°30′-40° 45′, long.75° 15′-75° 30′. Scale 1:62,500, contour interval 20 ft.
Corporate Agency Authors:
Geological Survey and Post-Office Department
Sort Author:
Geological Survey
Date:
Aug. 1897, reprint of edition of Aug. 1894
Publish Date ISO Format:
1897-08-01T00:00:00Z
Publication Start:
18970801
Publication End:
18970831
Corporate/Agency Author:
Geological Survey
Publication month:
5
Publication year:
1897
Notes:
NOTE.—The Geological Survey is making a topographic map of the United States. The sheets or which it is composed are projected without reference to political divisions, and are designated by some prominent feature found on them. Three scales are used, 1:62,500, 1:125,000, and 1:250,000. These correspond, approximately, to 1 mile, 2 miles, and 4 miles to 1 linear inch on the map. The size, unless otherwise given, is about 17½ inches in height by 11½ to 16 inches in width, exclusive of the margin, the width varying with the latitude. A description of the topographic map is printed on tbe reverse of each sheet catalogued below, unless otherwise stated. About one-fifth of the area of the country, excluding Alaska, has been mapped, nearly every State being represented. Massachusetts, Connecticut, Rhode Island, New Jersey, and the District of Columbia are completely mapped. Sheets of the regular size are sold by the Survey at 5c. each; but in lots of 100 or more copies, whether of the same sheet or of different sheets the price is 2c. each.
Notes:
NOTE.—The Geological Survey is making a topographic map of the United States. The sheets or which it is composed are projected without reference to political divisions, and are designated by some prominent feature found on them. Three scales are used, 1:62,500, 1:125,000, and 1:250,000. These correspond, approximately, to 1 mile, 2 miles, and 4 miles to 1 linear inch on the map. The size, unless otherwise given, is about 17½ inches in height by 11½ to 16 inches in width, exclusive of the margin, the width varying with the latitude. A description of the topographic map is printed on tbe reverse of each sheet catalogued below, unless otherwise stated. About one-fifth of the area of the country, excluding Alaska, has been mapped, nearly every State being represented. Massachusetts, Connecticut, Rhode Island, New Jersey, and the District of Columbia are completely mapped. Sheets of the regular size are sold by the Survey at 5c. each; but in lots of 100 or more copies, whether of the same sheet or of different sheets the price is 2c. each. 5c