REPORT OP THE SECRETARY. 33 



and molybdite in altered rhyolite; a mass of the newly discovered 

 sulphide tungstenite; crystallized ferberite; and a collection of 15 

 ores and minerals,, including molybdenite from Canada, carnotite 

 replacing wood, ferberite in the form of iridescent crystals, and a 

 specimen of the rare uranium-vanadium mineral uranite impreg- 

 nating friable sandstone. 



The exhibit of steel-hardening metals was further augmented by 

 specimens of vanadium ores with incrustations of crystals of the 

 ore minerals vanadinite and descloizite. Other gifts of interest in- 

 clude a series of specimens from the famous nitrate deposits of 

 Chile showing the caliche and its natural associations, a cross-fiber 

 vein of asbestos showing unusually long pure fibers, and sandstone 

 impregnated with the blue molybdenum sulphate, ilsemannite. 



Collections made for the division by members of the staff included 

 large exhibition specimens illustrating unconformities, conglom- 

 erates, rock phosphate, and phosphatic limestone secured by Dr. R. S. 

 Bassler ; albite crystals of unusual type, columbite, black mica, stau- 

 rolite, bauxite, and quartz, the last named mainly for use by the Sig- 

 nal Corps of the Army, collected by Dr. George P. Merrill ; rocks to 

 illustrate weathering, obtained by Dr. J. C. Martin; sphalerite with 

 associated minerals and brecciated chert, and apatite and hematite, 

 collected by Dr. Edgar T. Wherry. 



A mass of graphite, showing an unusual columnar structure, was 

 transferred from the United States Geological Survey, as were also 

 blocks, fragments, and pebbles from an Alaskan glacial ground mo- 

 raine of Silurian age, and a choice figured specimen of arborescent 

 calcareous sinter from the Mammoth Hot Springs, Yellowstone 

 National Park. 



Of meteorites there were added a newly found stone from Eustis, 

 Fla. ; a slice of the Carleton siderite; 280 grams of an undescribed 

 stone from Kansas City, Mo.; and an 826-gram specimen of the 

 Burkett (Tex.) meteoric iron. 



In the division of mineralogy and petrology gifts of exceptional 

 value from Mr. C. S. Bement included particularly fine exhibition 

 specimens of hetaerolite, crystals of rhodonite, zincite, leucophoeni- 

 cite, manganosite crystals, a cut gem, a free crystal and an embedded 

 crystal of willemite, and willemite with friedelite and white zeolite, 

 all from Franklin, N. J.; calamine, pyrite, and milky quartz, from 

 Colorado ; free crystals of scheelite and scheelite crystals attached to 

 chalcopyrite, from Mexico ; an exceptionally fine, large twinned crys- 

 tal of quartz and an unusual crystal of danburite, from Japan; the 

 rare mineral achtaragdite and a variety of vesuvianite — wiluite — 

 from Siberia. 



The American consul at Changsha, China, Mr. Nelson T. Johnson, 

 donated a specimen of twinned cinnabar crystals from China, show- 



