LIBRARY CATALOGUE SLIPS. 
[Mount each slip upon a separate card, placing the subject at the top of the 
second slip. The name of the series should not be repeated on the series 
card, but the additional numbers should be added, as received, to the first 
entry.] 
Purington, Chester Wells, 1871- 
. . . Methods and costs of gravel and placer mining 
in Alaska, by Chester Wells Purington. Washington 
Gov't print, off., 1905. 
273, ix p. illus., XLII pi. (inch map) diagrs. 23J cm 
survey. Bulletin no. 263) 
Subject series: A, Economic geology, 55. 
" Notes on dredging, by J. P. Hutchins;" p. 173-190. 
Bibliography; p. 261-262. 
1. Gold mines and mining — Alaska. 
( U. S. Geological 
Purington, Chester Wells, 1871- 
^ ... Methods and costs of gravel and placer mining 
f in Alaska, by Chester Wells Purington. Washington, 
Gov't print, off., 1905. 
273, ix p. illus., XLII pi. (inch map) diagrs. 23| cm . (U. S. Geological 
survey. Bulletin no. 263) 
Subject series: A, Economic geology, 55. 
" Notes on dredging, by J. P. Hutchins;" p. 173-190. 
Bibliography; p. 261-262. 
1. Gold mines and mining — Alaska. 
U. S. Geological survey. 
Bulletins. 
j no. 263. Purington, C. W. Methods and costs of 
<* gravel and placer mining in Alaska. 1905. 
c U.S. Dept. of the Interior. 
I see also 
« U. S. Geological survey. 
