REPORT OF NATIOlSrAX, MUSEUM, 1923. 83 



jarosite has been given. C. H. Kowley, of Salt Lake City, through 

 Mr. Heikes, presented a specimen of arsenopyrite with its oxidation 

 product scorodite, from the mine of the Western Utah Copper Com- 

 pany, Gold Hill, Utah. This shows cellular, porous, pale green 

 scorodite surrounding residual cores of arsenopyrite and is very inter- 

 esting in view of the demand for available sources of arsenic for use 

 in the manufacture of insecticides. Finally, Mr. Heikes has fur- 

 nished interesting examples of native gold in shale, from the Flying 

 Dutchman mine, near Bouse, Arizona. 



A noteworthy contribution to both economic geology and miner- 

 alogy' is from H. G. Clinton, of Manhattan, Nev., who generously do- 

 nated a fine series of arsenic and antimony minerals and ores, speci- 

 mens of gold in calcite, etc., chiefly from the White Caps Mine, in the 

 vicinity of Manhattan. P. M. Frank, formerly assistant curator of 

 mineral technology, while on a visit to northern Michigan, obtained 

 an unusually large and fine specimen of intergrown native silver and 

 native copper which forms a valued addition to the collections. 



Transfers from the United States Geological Survey include type 

 series illustrating Professional Paper No. Ill, on the ore deposits 

 of Utah; 14 specimens of described rocks from the Castle Rock 

 quadrangle, Colorado; a described collection of tungsten ores; and 

 a type set of manganese ores from western Virginia, illustrating a 

 bulletin published by the Survey of that State. 



The division of mineralogy has benefited largely through ex- 

 changes, upward of 60 species new to the collections, as well as 

 unusually fine exhibition specimens having been acquired in this 

 way. Of the latter, a part of a larger boulder of jade, variety ne- 

 phrite, was received from Col. W. B. Thompson, New York City, 

 and from Ward's Natural Science Establishment, Rochester, N. Y., 

 was obtained a large specimen of crystallized descloizite from South- 

 west Africa, being one of several of the finest examples of this 

 mineral ever found. From Ward's Establishment were also acquired 

 through various exchanges, several species new to the collections, 

 as well as other valuable and rare minerals. Other organizations 

 cooperating in this manner are the Philadelphia Academy of Natural 

 Sciences, from which were received 24 species including vauxite, 

 paravauxite, keeleyite, and kasolite; the Royal Ontario Museum 

 of Mineralogy, Toronto, Canada, which furnished a type set of 

 zeolites from Nova Scotia, described by Walker and Parsons, as well as 

 a number of rare minerals hitherto not represented in the collections, 

 and an interesting specimen of tubular amygdaloid; the Geological 

 Survey of Canada supplied camsellite and colerainite, also new to the 

 collections ; the Museum National d'Histoire Naturelle, Paris, France, 

 nine new or rare minerals; and the University of California, Berke- 



