590 REPORT OF NATIONAL MUSEUM, 1890. 



Lode, Nevada, the results of which were published in Monograph in of 

 the U. S. Geological Survey, entitled " The Geology of the Comstock 

 Lode." They have also been the subject of investigation by Messrs. 

 Hague and Iddings, of the Geological Survey, whose results are em- 

 bodied in Bulletin No. 7, IT. S. Geological Survey, 1885, entitled " The 

 Development of Crystallization in the Igneous Eocks of Washoe, Ne- 

 vada." 



The collection is in part duplicated. There is, first, a series of 198 

 specimens typical rocks of the region in sizes some 4 by 5 by 1 inches 

 and which is in part upon exhibition. Besides this is the main study 

 series in sizes about 1£ by 1 by \ inches and comprising 2,064 speci- 

 mens. (Catalogue Nos. 24001-24198 inclusive, and 70691-72754 in- 

 clusive). 



(4) The collections of the fortieth Parallel Survey. — This comprises some 

 3,000 specimens eruptive and sedimentary rocks collected by members 

 of the Fortieth Parallel Survey, under the direction of Clarence King 

 in 1867-'73. The eruptive rocks of the series were described by Prof. 



F. Zirkel in vol. vi (microscopic petrography) of the reports of the 

 TJ. S. Geological Explorations of the Fortieth Parallel. (Catalogue 

 Nos. 20301 to 23388, inclusive.) 



(5) New Hampshire State Survey, (J. H. Hitchcock in charge. — A collec- 

 tion in the form of rough hand specimens, some 6 by 6 by 1£ inches in 

 dimensions and representing the typical rocks of New Hampshire as 

 described by Hitchcock and Hawes in the reports of the Geological 

 Survey of New Hampshire. 



(6) The Hawes collections. — These comprise some 350 specimens erup- 

 tive and altered rocks, representing in part the work done by Dr. Hawes 

 in connection with the New Eampshire surveys as published in part 

 IV, vol. in, of these reports. It also includes the small fragments de- 

 scribed in his paper as the Albany granites and their contact j)he- 

 nomena(Am. Jour, of Science, 1881, xxr, p. 21-32), Cat. Nos. 29628-29290. 



(7) The Pacific Slope quicksilver collections. — These comprise several 

 hundred small specimens (mostly 4 x 6 cm) rocks and ores from the quick- 

 silver regions of the locality above noted, as collected and described by 



G. F. Becker and colleagues in Monograph xni, of the U. S. Geologi- 

 cal Survey, entitled Geology of the Quicksilver Deposits of the Pacific 

 Slope. 



(8) TJ. S. Geological Survey collections, F. V. Hayden in charge.— The 

 various collections made by the surveys under the direction of F. V. 

 Hayden, mainly from Colorado, New Mexico, Utah, Montana, Wyoming, 

 Idaho, and the Yellowstone National Park. These comprise some 1,200 

 hand specimens of eruptive and sedimentary rocks. Much valuable 

 material is missing from these, having been lost or destroyed prior to 

 1880. 



(9) Collections from surveys west of the one hundredth meridian. — The 

 collections made in 1871-'79 under the direction of Lieut. G. M. 



