TOPOGRAPHIC MAPS AND FOLIOS. 
Topographic Atlas Sheets. 
When, in 1882, the Geological Survey was directed by law to make a geologic map 
of the United States, there was in existence no suitable topographic map to serve as 
a base for the geologic map. The preparation of such a topographic map was there- 
fore immediately begun. About one-third of the area of the country, excluding 
Alaska, has now been thus mapped. The map is published in atlas sheets, each 
sheet representing a small quadrangular district, as explained on page 60. The sepa- 
rate sheets are sold at 5 cents each when fewer than 100 copies are purchased, but 
when they are ordered in lots of 100 or more copies, whether of the same sheet or of 
different sheets, the price is 2 cents each. The mapped areas are widely scattered, 
nearly every State being represented. About 1,325 sheets have been engraved and 
printed; they are tabulated below, by States. 
Published topographic atlas sheets, arranged by States. a 
ALABAMA. 
Name of atlas sheet. 
Position of SE. 
corner of sheet. 
Lat. 
Long. 
Areacovered 
Contour 
interval. 
Scale. 
Price. 
Anniston 
Ashland 
Bessemer 
Birmingham 
Brookwood 
Clanton 
Cullman 
Fort Payne ( Ala.-Ga. ) 
Gadsden 
Huntsville (Ala.-Tenn.) . . 
Jasper 
Rome (Ga.-Ala. ) 
Scottsboro (Ala.-Tenn.).. 
Springville 
Stevenson (Ala.-Ga.-Tenn 
Talladega 
Tallapoosa (Ga.-Ala.) 
Wedowee (Ala.-Ga.) 
Wetumka 
Fortymile 
33 00 
33 00 
33 30 
33 00 
32 30 
34 00 
34 00 
34 00 
34 30 
33 30 
34 00 
34 30 
33 30 
34 30 
33 00 
33 30 
33 00 
32 30 
85 30 
85 30 
87 00 
86 30 
86 30 
85 30 
86 00 
86 30 
87 00 
85 00 
86 00 
86 00 
85 30 
86 00 
85 00 
85 00 
86 00 
i degree 
do.. 
do.. 
do.. 
do.. 
do.. 
do.. 
do.. 
do.. 
do.. 
do.. 
do.. 
do.. 
do.. 
do.. 
do.. 
do.. 
do.. 
do.. 
Feet. 
50 
100 
100 
100 
50 
50 
100 
50 
100 
100 
50 
100 
100 
100 
100 
100 
100 
50 
50 
1 : 125000 
1 : 125000 
1 : 125000 
1 : 125000 
1 : 125000 
1 : 125000 
1 : 125000 
1 : 125000 
1 : 125000 
1:125000 
1 : 125000 
1 : 125000 
1 : 125000 
1 : 125000 
1 : 125000 
1 : 125000 
1:125000 
1 : 125000 
1:125000 
Cents. 
ALASKA. 
64 00 141 00 1 degree 
50 1 : 250000 
a The Survey has issued a sheet of "Conventional signs" used on its topographic maps; price, 5 
cents a single sheet; 2 cents each in lots of 100 or more. 
155 
