MINERALOGY. 249 



Calcite, barytes, fluor-spar, and quartz are the minerals which most 

 commonly occur with ores in mineral veins. The mode in which each 

 of these may have been deposited is discussed, and experiments on their 

 formation are cited. Concludes that vein-fissures have been filled in by 

 the wet way, and that the chief medium of solution has been water at 

 various temperatures. Attention is directed to the influence of the 

 temperature of a solution on the crystalline form of the deposited 

 mineral. Experiments show that fluor-spar is deposited in cubes at a 

 normal temperature, but in octahcdra between 240° and 250° C. It is 

 hence concluded that the tin-veins of the Erzgebirge, which carry octa- 

 hedral fluor, were formed at a higher temperature than that .which 

 obtained during the filling-in of vein-fissures in the younger forma- 

 tions, where the fluor is cubic. F. W. R. 



ScnxoER, — . Studien an Mineralien von Zwickau. Programm der 



llealschule zu Zwickau fiir Ostern 1874. 4to. Pp. 17. [Noticed 



in N. Jahrb. Heft vi. p. 631.] 



Notes on minerals occurring at Zwickau in Saxony, including several 



new occurrences. Desciibes calcite of Planitz and Griinau, blende 



from clay-ironstone, and calcite and quartz from cavities in amygda- 



loidal melaphyre. F. W. E. 



ScHRAFF, Prof. A. Neues Mineral vom Banat. N. Jahrb. Heft vi. 

 p. 608. 



Veszehjite is a new phosphate of copper from the iron mine of Mora- 

 vicza, near Bogschau, in the Banat. It forms crystalline crusts, of 

 bluish-green colour, on a garnet rock. Its analysis leads to the formula 

 4 CuO . P^Og-l-SHoO. The crj^stals are tricHnic, with the following 

 elements :—a : h: c=0-90529 : 1 : 0-71516. ^=92° 1', 7?=101° 3', ^= 

 91° 9'. F. W. R. 



. Antimonit von Michelsberg. Min. Mitt. Hcfti. p. 95. 



Note on specimens of antimonite from a vein near Michelsberg, in 

 Bohemia. 



. Ciilestin vom Banat. Min. Mitt. Heft i. pp. 95, 96. 



A specimen of celestine from Steierdorf, in the Banat, shows a very- 

 rare form of crystal — namely. Miller's faces d and a, and subordiuatcly 

 the pyramid y and doma o. F. W. R. 



. Monographic des Roselith. Min. Mitt. Heft ii. 137-160, 



with plate (crystals and projections). 



Sketches the history of the rare species lloscUie, notes its recent 

 discovery at Schneeberg, discusses its chemical composition, and fully 

 describes its crystalline forms. F. W. R, 



. Ueber Klinochlor, klinoquadratisches und klinohexagonales 



System. Min. Mitt. Heft ii. pp. 161-164. 



As Nordenskiold has suggested that Thomsenolite maybe referred to 

 a new division of the monoclinic system, which he calls the clinoqua- 

 draticj so Schrauf shows that clinochlore may be regarded as represent- 



