478 Scientific Intelligence. 



From Gilpin County, Colo., coating a green copper ore or a 

 black uraninite and associated with gypsum. In many cases 

 had been labeled johannitc or uranopilite from which, how- 

 ever, it is distinguished by both chemical and optical properties. 

 A specimen from Cornwall, England, showed similar optical 

 characters and is probably also gilpinite. 



Mullanite. E. V. Shannon, this Journal, 45, 66, 1918. 

 Orthorhombic 1 In slender prisms, showing a number of indis- 

 tinct planes. In some cases terminated by a face at right angles 

 to prism zone. At times fibrous. Cleavage, c(001) and &(010) 

 distinct. Color, steel-gray. Streak, brownish black. H. = 

 3-5. G. = 6-3-6-4. Comp.— 5PbS.2Sb 2 S 3 . Found at Gold 

 Hunter mine, near town of Mullan, Coeur dAlene district, 

 Idaho, and from Iron Mountain mine, near Superior in western 

 Montana. Analyzed from both localities. At Iron Mountain 

 mine associated with epiboulangerite and sphalerite. Found in 

 quartz at both mines. Named after Capt. John Mullan, a 

 pioneer army engineer of the region. 



Tungstenite. E. C. "Wells and B. S. Butler, Jour. "Wash. Ac. 

 Sc, 7, 596, 1917. Earthy to foliated structure. Color and 

 streak, dark lead-gray. H. = 2-5, marks paper easily. G. = 7-4. 

 Comp. — Probably WS 2 . Insoluble in HC1 or HN0 3 . Decom- 

 posed by aqua regia or by fusion with sodium carbonate. 

 Occurs at the Emma mine, Little Cottonwood district, Salt Lake 

 County, Utah. Associated with quartz, galena, pyrite, tetra- 

 hedrite and argentite. 



Colerainite. Eugene Poitevin and R. P. D. Graham ; Canada 

 Dept. Mines, Geol. Sur., Mus. Bull., 27, 66, 1918.— Hexagonal. 

 In extremely thin and minute hexagonal plates. Often grouped 

 in rosettes or spherical masses. H. = 2-5-3. G. = 2-51. Lus- 

 ter vitreous to pearly. Colorless or white. Optically +. 

 Refractive index about 1-56. Comp.— 4MgOAl 2 3 .2Si0 2 .5H 2 0. 

 B. B. first whitens and disintegrates with a tendency to exfoliate 

 but finally fuses quietly to a white glass. Moistened with cobalt 

 nitrate and heated turns blue. In C. T. whitens, decrepitates 

 and at a high temperature yields much water. Decomposed 

 with difficulty by hydrochloric acid. Occurs in cavities as a 

 drusy coating on white massive material which has a similar 

 composition and properties and which is probably largely made 

 up of the same mineral. Found on the dumps at the old Stand- 

 ard mine and Union pit in the asbestos and chromite district of 

 the Black Lake area, Quebec. The name is derived from 

 Coleraine township in which the mineral was found. 



6. The Geological Society of London. — The Murchison Medal 

 has recently been awarded by the Geological Society to the 

 veteran Canadian paleontologist, Doctor G. F. Matthew, 

 together with ten guineas, "as an acknowledgment of his 

 valuable work on the stratigraphy and paleontology of the lower 

 Paleozoic rocks of North America . . . His work has been 



