12 REPORT OF NATIONAL MUSEUM, 1889. 



G. F. Becker aud colleagues in Monograph xiii of the U. S. Geological 

 Survey, entitled Geology of the Quicksilver Deposits of the Pacific Slope. 



U. 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. 



Collections from surveys west of the one hundredth meridian. — The col- 

 lections made in 1871-'79 under the direction of Lieut. G. M. Wheeler, 

 IT. S. Engineer Department. These comprise some 680 specimens 

 which, though but little studied by modern methods, are, with those of 

 the Hayden surveys, kept together for purpose ot reference. 



Pigeon Point collections. — These comprise 400 specimens, illustrating 

 various contact phenomena, as occurring at Pigeon Point on the north 

 shore of Lake Superior, and as described by Prof. W. S. Bayley in a 

 forthcoming bulletin of the U. S. Geological Survey. 



Menominee Valley and Marquette River collections. — These comprise 

 354 specimens illustrative of the dynamic metamorphism of eruptive 

 rocks, as described by Dr. G. B. Williams in Bulletin No. 62, U. S. Geo- 

 logical Survey. 



Alaska collections. — These comprise some 250 specimens miscellaneous 

 rocks collected mainly by W. H. Dall in 1866-68. 



Missouri. — A series comprising f 114 characteristic rocks from south- 

 western Missouri, as collected and described by Prof. E. Haworth. 

 (Catalogue, Nos. 38628-38741, inclusive.) 



Bear Paw Mountain, Montana. — A small series of eruptive, metamor- 

 phic, aud drift rocks from the Bear Paw Mountains, collected by Dr. A. 

 C. White and J. B. Marcou in 1883. (Catalogue, Nos. 28666-28743, inclu- 

 sive.) 



St. Gothard Tunnel. — A series of metamorphic rocks, comprising some 

 80 specimens received from the Swiss commissioner to the Centeunial 

 Exposition at -Philadelphia in 1876. (Catalogue, Nos. 37495-37574.) 



Commander Islands, Coast of KamtschatJca. — A small series of the 

 characteristic rocks of these islands collected by Dr. L. Stejuiger in 

 1882-'83. (Catalogue, Nos. 37937-37972.) 



Australian collections — A series of some 355 rocks from Victoria, 

 Australia, as received from the Australian centennial commissioners 

 in 1876. (Catalogue, Nos. 28121-28475.) 



Brazilian collections. — An interesting series of 269 specimens of erup- 

 tive and metamorphic rocks received from the governmental geologist, 

 O. A. Derby. (Catalogue, Nos. 69759-70027.) 



To the extent that facilities have permitted, thin sections for micro- 

 scopic study have beeu prepared from the rocks of both the exhibition 

 and study collections. At the date of writing the number of these 

 slides amounts to some 4,000. 



