VIII 
ADVERTISEMENT. 
TOPOGRAPHIC MAP OF THE UNITED STATES. 
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 topograpbic map was therefore immediately begun. About one-fifth of the 
area of the country, excluding Alaska, has now been thus mapped. The map is published in atlas sheets. 
Under the plan adopted the entire area of the country is divided into small quadrangular districts 
(designated quadrangles), bounded by certain meridians and parallels. The unit of survey is also the 
unit of publication. The separate sheets are sold at 5 cents each when fewer than 100 copies are pur- 
chased, 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. More than 900 sheets have been engraved and printed; they are tabulated 
by States in the Survey's "List of Publications," a pamphlet which may be had on application. 
The map sheets represent a great variety of topographic features, and with the aid of descriptive 
text they can be used to illustrate topographic forms. This has led to the projection of an educational 
series of topographic folios, for use wherever geography is taught in high schools, academies, and 
colleges. Of this series the first folio has been issued, viz: 
1. Physiographic types, by Henry Gannett, 1898, folio, consisting of the following sheets and 4 
pages of descriptive text: Fargo (N. Dak.-Minn.), a region in youth; Charleston (W. Va.), a region 
in maturity; Caldwell (Kans.), a region in old age; Palmyra (Va.), a rejuvenated region; Mount 
Shasta (Cal.). a young volcanic mountain; Eagle (Wis.), moraines; Sun Prairie (Wis.), drumlins; 
Donaldsonville (La.), river flood plains; Boothbay (Me.), a fiord coast; Atlantic City (N. J.), a bar- 
rier-beach coast. 
GEOLOGIC ATLAS OF THE UNITED STATES. 
The Geologic Atlas of the United States is the final form of publication of the topographic ajjd 
geologic maps. The atlas is issued in parts, or folios, progressively as the surveys are extended; a~nd 
is designed ultimately to cover the entire country. 
Each folio contains topographic, geologic, economic, and structural maps, together with textual 
descriptions and explanations, and is designated by the name of a principal town or of a prominent 
natural feature within the district. 
Two forms of issue have been adopted, a " library edition " and a "field edition." In both the 
sheets are bound between heavy paper covers, but the library copies are permanently bound, while 
the sheets and covers of the field copies are only temporarily wired together. 
Under the law a copy of each folio is sent to certain public libraries and educational institutions. 
The remainder are sold at 25 cents each, except such as contain an unusual amount of matter, which 
are priced accordingly. Prepayment is obligatory. The folios ready for distribution are listed below. 
H 
Area, in 
Price, 
No. 
Name of sheet. 
State. 
Limiting meridians. 
Limiting parallels. 
square 
miles. 
in 
cents. 
1 
Livingston ....... 
Montana.. 
lioo-llio 
45°-46° 
3,354 
25 
2 
Itinggold { 
Georgia... 
Tennessee 
} 
85°-85° 30' 
34° 30'-35° 
980 
25 
3 
Placerville 
California. 
120° 30'-121° 
38° 30'-39° 
932 
25 
4 
Kingston 
Tennessee 
84° 30'-85° 
35° 30'-36° 
969 
25 
5 
Sacramento 
California. 
121°-121° 30' 
38° 30' -39° 
932 
25 
G 
Chattanooga 
Tennessee 
85°-85° 30' 
35°-35o 30' 
975 
25 
7 
Pikes Peak* 
Colorado.. 
105°-105° 30' 
38o 30'-39o 
932 
25 
8 
Sewanee 
Tennessee 
Colorado.**. 
85° 30'-86o 
106° 45'-] 07° 15' 
350-35° 30' 
38° 45'-39° 
975 
465 
25 
9 
Anthracite- Crest- 
50 
ed Butte. [ 
Virginia*— 
| 
10 
Harpers Ferry.. .< 
West Va_ 
Maryland. 
i 
77° 30'-78° 
390-39° 30' 
925 
25 
/*H* 
J a c ks mSftt0SlaiSm 
Estillville j 
1 California. 
Virginia*- 
) 
120° 30'-121° 
38°-38o 30' 
938 
25 
.12 
Kentucky^ 
82° 30'-83° 
36° 30'-37° 
957 
25 
I 
Tennessee 
J 
13 
Frederick s b urg ««i 
Maryland. 
Virginia .. 
} 
77 o_7 7 o 30' 
38°-38° 30' 
938 
25 
14 
Staunton < 
Virginia . . 
West Va.. 
} 
790-79° 30' 
38°-38o 30' 
938 
25 
15 
Lassen Peak 
California. 
121°-122o 
40°-4] 
3, 634 
25 
16 
Knoxville < 
Tennessee 1 
N. Carolina!/ 
830 30'_84o 
35° 30'-36o 
925 
25 
17 
Marysville 
California. 
121° 30'-122° 
390-39° 30' 
925 
25 
18 
Smartsville 
f 
California. 
Alabama..!] 
1210-121° 30' 
390-390 30' 
925 
25 
19 
Stevenson < 
Georgia... \} 
85° 30'-86o 
34° 30'-35° 
980 
25 
I 
Tennessee 
20 
Clevelaud 
Tennessee 
840 3o'_85o 
350-35O 30' 
975 
25 
21 
22 
Pikeville 
Tennessee 
Tennessee 
850-850 30' 
85° 30'-86o 
35o 30'-36o 
35° 30'-86° 
969 
969 
25 
McMinnville 
25 
23 ! Nomini j 
Maryland. 
Virginia . . 
} 
76° 30'-77° 
380-38° 30' 
938 
25 
* 24 
Three Forks 
Montana.. 
1110-112° 
45°-46° 
3,354 
50 
'Out of stock. 
