1394 Journal of Applied Microscopy 



button, as readily as a lead button is obtained from cerussite. Large quantities 

 of sodium are to be avoided, and care must be taken not to touch the metal with 

 the fingers, as the reaction sometimes begins spontaneously. a, f. r. 



Morgan, Leonard P., and Smith, E. F. Experi- Weighed portions of chalcopyrite were 

 ments on Chalcopvrite. Jour. Amer. Chem. i . .1 • r 1 , ^ 



Soc. 22: 107, Feb. 1 90 1. exposed to the action of dry hydro- 



chloric acid gas in a heated combustion 

 tube. The liquid in the tube was titrated with potassium permanganate, and 

 gave an iron content of from 30.56 to 30.72 per cent., theory requiring for 

 chalcopyrite 30.5 per cent. Results indicate complete decomposition, and show 

 that all the iron is in a ferrous state. The results obtained by heating the 

 mineral in a closed tube with a solution of copper sulphate confirm this. 



A. F. R. 



Atkinson, Elizabetli Allen. Indium in Tungsten From 150 to 300 grams of wolframite. 

 Minerals. Jour. Amer. Chem. Soc. 20: 811, , ... -^ j 1 i-^ r 1 



jg g hubnerite, and scheelite, from several 



localities, were carefully examined for 

 indium, but only in the wolframite from Zinnwald was any found. Author comes 

 to the conclusion that indium cannot be regarded as an associate of tungsten, 

 and that Hoppe-Seyler's suspicion as to blende being its origin is probably cor- 

 rect, for only in the Zinnwald mineral was it found, zinc also being present only 

 there. a. f. r. 



Vater, Heinrich. Ueber den Einfluss der Losun- This paper discusses the action of the 

 genossenauf die Krystallisationdes Calcium- solution upon gypsum and anhydrite, 

 carbonates. Theil viii, Zeit. f. Kryst., 31 : , 1 j ^1 ^ ^ i 



-^g_._g jg„Q -^ and concludes that at lower tempera- 



tures, below 30°C., calcite alone results, 

 and that the only known cause by which pure calcium carbonate separates as 

 aragonite is a temperature exceeding 80°C. a. j. i\i. 



Qoldschmidt, V. Ueber Trogerit und kiinst- Concludes trogerite is tetragonal, not 

 lechen Uranospinit. Zeit. f. Kryst. 31 : 460- ... j ^ 



478 iSqq j -' ^ monoclmic, and ventures supposition 



that all other uranium micas : autunite, 



uranospinite, torbernite, zeunerite, and phosphuranylite are also tetragonal. 



A. J. M. 



Viola, C. Zur Kentniss des Anorthits vom Crystallographic Study. 

 Vesuv. Zeit. f. Kryst. 31: 484-498, 1899. j b f j 



Ward, H. L. Notice of an Aerolite that recently The Stone is light ash-gray in color, 



fell at Allegan, Mich. Am. Jour. Sci. iv. r • ui j 1 -^i. ui 1 



g. jg ° ' very friable, and covered with a black 



crust, which is 1-2 mm. thick, and has 



a smooth or wavy surface. The structure is chondritic, and the following 



minerals are present : enstatite, chrysolite, feldspar, troilite and iron, the two 



latter being granular and evidently scattered. G.^3.558. l. mci. t,. 



Qrimsley, G. P., and Bailey, E. H. S. Report 

 on Gypsum and Gypsum Cement. Vol. v, 

 Univers. Geol. Sur. of Kansas. 



