238 MINEBALOGY. 



felspar associated with Kjerulfine of Bamle in Norway, named Tscher- 

 mahite by v. Kobell, is referred to albite ; Andesine is probably only 

 an altered oligoclase, and the Hafnefjordite of Iceland is referred to 

 labradorite. F. W. E. & G. A. L. 



Des Cloiseaux, M. Note snr 1' element pyroxenique de la roche 



associee lui platine de I'Oural. [The Pyroxenic Element of the 



Rock found associated with Platinum in the Urals.] Compt. Rend. 



t. Ixxx. j)p. 785, 786. 



Crystallographic and optical study of the mineral described as 



diallage in M. Daubrce's paper on the occurrence of platinum [p. 236] 



leads to the conclusion that the pyroxenic mineral in the peridote rock 



of Mschne-Tagilsk is a ferriferous salite. P. W. R. 



. [A new Pelspar, <fec.] Zeitscli. deutsch. geol. Ges. Bd. xxvii. 



Heft ii. pp. 455-462 ; 5 figs. 



Refers, among other things, to recent optical studies which lead the 

 author to infer the existence of a new triclinic felspar, standing close 

 to orthoclase chemically, but very different in optical characters. The 

 species are evidently related by dimorphism. P. W. R. 



. [Microcline.] Zeitsch. deutscJi. geol. Ges. Bd. xxvii. Heft iv. 



pp. 955-957 ; 2 tigs. 

 Note announcing that the intercalated lamellae and veins in microcline 

 consist of albite. Microcline is a dimorphous triclinic species. 



. [Mineralogical Notes.] iV. Jahrb. Heft iv. pp. 395-399. 



Notes on recent mineralogical work, in a letter to Yom Rath, who 

 adds remarks on the constitution of the felspars, &c. 



Dewalque, Fr. Notes sur la glauconie d'Anvers. [Glauconite of 



Antwerp.] Ann. Soc. Geol. Belg. t. ii., Memoires, pp. 3-5. 

 Gives analysis leading to the formula 



(2AP, W)SiH3(Pe, K, Ca, Mg, Na=^)Si+3IP. 

 Dieulafait, L. Diamonds and Precious Stones. New Ed. 8vo. 



Doell, Ed. Dialogit nach Mangan blende und Baryt : pseudomorphosen 

 nach Pahlerz von Pribram. Verh. Jc.-k. geol. Reichs. pp. 95-97. 



The following pseudomorphs are described: — 1. Diallogite after 

 manganese-sulphide ; 2, after barytes. Next, three new ones from 

 Pribram ; 3. Zinc-blende after tetrahedrite ; 4. Specular iron after the 

 same; 5. A mixture of chalcopyrite, redruthite, zinc-blende, and galena 

 after the same. Suggestions as to minerals which may stand in para- 

 genetic relation to tetrahedrite are added. E. B. T. 



Kupferkies und Bitterspath nach Cuprit. [Copper-pyrites 



and Bitter spar after Cuprite.] Mm. Mitt. Heft i. pp. 31-34; 

 plate ; also Ferh. h.-Tc. geol. ReicJis. pp. 33-35. 

 Description of pseudomorphs from the copper-mines of Tagilsk, Ural, 

 exhibiting a mixture of copper-pyrites and brown spar in alternating 



