[CONTRIBUTION FROM THE
MASSACHUSETTSINSTITUTE O F TECHNOLOGY.]
REVIEW OF AMERICAN CHEMICAL RESEARCH. VOL. V.
No. 5.
ARTHURA. NOYES,Editor ; HENRYP. TALBOT, Associate Editor. REVIEWERS: Analytical Chemistry, H.P. Talbot and W. H.Walker; Biological Chemistry, A. G. Woodman ; Carbohydrates, G. W. Rolfe ; General Chemistry, A. A. Noyes ; Geological and Mineralogical Chernistry, W. 0. Crosby ; Inorganic Chemistry, Henry Fay ; Metallurgical Chemistry and Assaying, H.0. Hofman ; Organic Chemistry, J. F. Norris ; Physical Chemistry, H. M. Goodwin ; Sanitary Chemistry, E. H. Richards ; Technical Chemistry, A. H. Gill aod F. H. Thorp.
GEOLOGICAL AND MINERALOGICAL CHEMISTRY. M. I,. FULLER, REVIEWER.
Thomsonite and Lintonite from the North Shore of Lake Superior. BY N. H. WINCHELL. A m . Geol., 22, 347:349.T h e paper describes the properties, associations, and localities of both minerals. An analysis of lintonite is given and the reasons (optical) for its separation from tnesolite or thomsonite, to which it might be referred on chemical grounds. Thalite and Bowlingite from the North Shore of Lake Superior. BY N . H. WINCHELL. A m . Geol., 23, 41-44.-The treatment of the subject is mainly descriptive, but includes a new analysis of thalite. Chlorastrolite and Zonochlorite from Isle Royale. BY N. H. WINCHELL. A m . Geol., 23, 116-118.-'I'he paper includes descriptions of both minerals, with an analysis of the former.
On the Occurrence of Quenstedtite near Montpelier, Iowa. BY OTTO KUNTZE. A m . Geol., 23, 119-121.-The sandstone bed of a small creek is locally incrusted above the water with a dry yellow mineral which on analysis proved to be nearly pure quenstedtite (Fe,( SO,), 4- 1oH,0), a mineral previously described by Dana as coming only from Chile. On exposure to direct sunlight it rapidly decomposes and disappears, but under favorable conditions niay accumulate to a thickness of I or 2 inches during a single summer. T h e material is derived from the decomposition of fine scales of pyrite, with which the sandstone is filled.
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Review of American Chemical Reseamh.
Clay Resources of Ilissouri. BY H. A. WHEELER. f%g. Min. J . , 66, 426-427.-The paper includes statistics relating to t h e character, use, output, and price of the clays, with a description of the condition of the industry. Analyses a r e given for white-ware clays, fire clays, potter's clays, shales, brick clays, and gumbo clays. The Alkaline Reaction of Some Natural Silicates. BY F. W. CLARKE. /. Am. Chenz. Soc., 20, 739-742.-on adding distilled water containing a very little alcoholic phenolphthalein to samples of certain finely pulverized silicates, including micas, feldspars, zeolites, etc., alkaline reactions were immediately obtained. As would be expected, the colors were most intense in the case of those minerals which in nature are most subject to alteration. Similar results were also obtained from tests upon the common igneous rocks. T h e rapidity of the action is a striking feature. Petroleum Inclusions in Quartz Crystals. BY CHAS. I,. REESE. /. Am. Chem. SOL.,20, 7gj-797.-Crystals of quartz with petroleum inclusions from Marshall Co., Ala., are described and illustrated. T h e petroleum was recognized by its fluorescence, odor, and combustibility. Mineral Resources of Cuba. BY RAIMC'KDO CABRERA, translated by L.E. LEVY. J . l k n h h z h z s t . , 146, 26-41.--I)escriptioris and analyses are given of the more important ores and economic deposits including asphaltum, phosphate rock, and the ores of gold, silver, lead, copper, iron, and manganese. The Slate Regions of Pennsylvania. BY MASSFIELDMERStone, 17, 77-go.-A description is given of each of the principal slate-producing regions, accompanied by tables of statistics relating to the output and properties of the slates. T h e probable resistance to corrosion by smoke, sulphurous vapors, etc., was tested by treatment for 63 hours in a 2 per cent. solution of HCl f H,SO,. T h e results are given in a tabulated form. The Bayport, nichigan, Quarries. BY A . C. BENEDICT. Stone, 17, 153-164.-The limestone from these quarries is used as road metal, building stone, or burned for lime. Analyses are given for the building stone and lime varieties. RIMAN.
GENERAL AND PHYSICAL CHEnISTKY. A . A . NOPES, REVIEWER
A Revision of the Atomic Weight of Nickel. 11. The Determination of Nickel in Nickelous Bromide. BY THEODORE
