228 MINERALOGY. 



CoRENWiNDER, B. Sur roriginc des efflorescences de sulfate de 

 chaux dans le voisinage des eaux sulfureuses de Lnchon. [Origin 

 of efflorescent sulphate of lime in the neighbourhood of the sul- 

 phurous waters of Luchon.] Ann. Soc. Geol. Nord, 1870-74, 

 p. 29. 

 Refers the origin to the action of hydrosulphuric acid on carbonate 

 of lime. 



Courtis, W. M. The Wyandotte Silver Smelting and Refining 



AVorks. Trans. Amer. Inst. Min. Eng. vol. ii. p. 89. 

 Notice of minerals observed, p. 91. Analyses of ores, p. 92. 



Cred:jter, H. [Antimony-ore.] Sitzungsb. naturf. Gesell. Leipzig. 



[Noticed in N. Jahrb. Heft vii. pp. 740, 741.] 

 Announces the discovery of a vein of antimony-glance in granulite 

 on the western side of the Eichberg in Saxony. 



Dana, E. S. Ueber Datolith. Min. Mitt. Heft i. pp. 1-6, with 

 plate ; and Amer. Journ. ser. 3, vol. viii. pp. 68, 69. 



Crystallographic description of datolite. The datolites of Arendal, 

 Andreasberg, Toggiana, and Bergen Hill are described, and several 

 Hew faces are mentioned. All the observed forms are tabulated, with 

 the more important angles. E. W. R. 



. Morphologische Studien uber Atacaniit. Min. Mitt. Heft ii. 



pp. 103-108, with woodcut j and Amer. Journ. ser. 3, vol. viii. 



p. 69. 



Morphological observations on Atacamite from Wallaroo, South 



Australia. A large number of measurements of crystals are tabulated. 



. Calcitdrilling nach 2R. Min. Mitt. Heft ii. p. 180, with 



woodcut. 



A specimen of calcite from Dognazka, in Hungary, exhibited the 

 acute rhombohedron |-R. In addition to several twins, a group of 

 three individuals occurred ; and as the angle between two correspond- 

 ing faces is about 92°, the plane of combination is 4-2R. E. W. R. 



Dana, Prof. J. D. On Serpentine Pseudomorphs and other kinds 

 from the Tilly Poster Iron Mine, Putnam Co., New York. Amer., 

 Journ. ser. 3, vol. viii. pp. 371-381, 447-459, with 2 plates. 



Geological Structure of the region : — 1, Archgean rocks. 2. Ore-bed. 

 3. Veins in the ore-bed. 4. Minerals of later origin, resulting from 

 alterations of the older minerals, or in other ways. TJie Pseudomorphs 

 and their teachings : — 1, of Serpentine, or of serpentine and dolomite. 

 These are cubic, the form being perfect, but the mass partly serpentine, 

 partly dolomite, with cubical cleavage, after some mineral like galena ; 

 or hexagonal, probably after calcite; others after apatite, chlorite, 

 chondrodite, cnstatite, biotite, dolomite, ^ind brucite. 2, of Brucite, 

 after dolomite. 3, of Magnetite after dolomite, chondrodite, &c. 4, of 



