84 THE U. S. GEOLOGICAL SURVEY 



Division of Engraving and Printing. The Division of En- 

 graving and Printing, administered by the chief engraver, is 

 charged with all mechanical work involved in the reproduction 

 of official maps or other illustrations published directly by the 

 Survey. It includes an engraving and printing plant, an in- 

 strument shop and a photographic laboratory. It has been 

 organized on a scale that permits it not only to do the work of 

 this character required by the Survey but also to obtain from 

 the Public Printer, by bidding in competition with private 

 firms, work for other branches of the government. 



Plant. The headquarters of the United States Geological 

 Survey are in the Interior Department building, on the block 

 bounded by E and F and 18th and 19th Streets, N. W., at 

 Washington. 



The chemical laboratory, in which is performed the analyti- 

 cal work necessary for the completion of geologic field in- 

 vestigations and some other researches in chemical geology, 

 has equipment valued at $22,000. The equipment in the physi- 

 cal laboratory is valued at $5,000. The equipment used in the 

 engraving and printing plant is valued at over $1,000,000. 

 This equipment includes 10 power presses and 13 hand presses. 

 The library contains about 120,000 volumes, 100,000 pam- 

 phlets and 25,000 maps. 



The Survey maintains branch offices at Denver, Salt Lake 

 City, San Francisco and other places, most of them in govern- 

 ment buildings. 



