256 MINERALOGY. 



eggs in Peruvian guano. Its analysis shows it to be a new species, 

 having the following composition— (H,N),S0,4-2K,S0, +3KHS0,+ 

 4aq. " r. W. 11. 



WicuMANN, A. Die Pseudomorphoson des Cordierits. Zeit. deutsch. 

 geol. Ges. Bd. xxvi. Heft 5, pp. 675-701, with plate. 



Studies of the microscopic structure of the following minerals, as 

 products of the alteration of cordierite — chlorophj^Iite, praseolite, 

 aspasiolite, gigantolite, hard fahlunite, pyrargillite, fahlunite (tricla- 

 site), and pinite. F. W. it. 



"WiLLCox, J. Corundum from Pennsylvania. Proc. Ac. Nat. Sci. 

 Philadel. p. 266. 



Specimen of corundum surrounded by chlorite, in which there seemed 

 to have been an alteration of one of the minerals into the other. Crys- 

 tals of corundum from S. Carolina, one partly, another wholly, con- 

 verted into margarite. A. H. G. 



— . New Mineral Localities in Canada not mentioned in Geol. 



Eeport on Canada or Dana's Mineralogy. Proc. Ac. Nat. Sci. 

 Philadel. p. 276. 



Winkler, Dr. Clemens. Ehagit und Eoselith. Journ. prakt. Chem., 

 N. S. Bd. X. pp. 190-192. 



Bliagite is a new species, recognized by Weisbach, from the Weisser- 

 Hirsch mine, near Schneeberg, in Saxony. It occurs in green bo- 

 . tryoidal groups, whence the name. Its analysis leads to the formula 

 BiioA8402, + 8Hp, or, dualistically, SBi^Og . 2As,0. + 8H^0. Roselite, 

 a rare mineral of which only two species were previously known, has 

 been found at the Daniel mine, near Schneeberg. Its composition may 

 be represented by the formula 3R0 . As^Og+H^O ; where R=Ca, Mg, 

 and Co. P. W. R. 



Wleugel, Amanuensis. Analyse af Bergkork fra Mungafjeld. 

 [Analysis of mountain-cork from Mungafjeld.] Forhandl. Yid.- 

 Selsk. Aar 1873, Hefte ii. p. 488. 



Wrioht, Dr. C. E. A. On Pyrites as a Source of Sulphur, Iron, 

 and Copper. Journ. Soc. Arts, vol. xxii. no. 1119, pp. 586-547. 



The different kinds of pyrites are described, and analyses of some are 

 given. The greater part of the paper is a description of processes of 

 extraction. W. W. 



WuRTz, H. streaks of Coals. Proc. Lye. Nat. Hist. N. York, ser. 

 2, no. 4, p. 125. 



Note suggesting the observation of the colour of the streaks made by 

 different kinds of coal as a ready means of field-determination. Alber- 

 tite gives the blackest streak; Grahamite a deep reddish- or maroon- 

 coloured streak. G. A. L. 



Zepharovich, M. Y. Eitter von. Mineralogische Mittheilungen. Y. 



