232 MiNERALoer. 



zoic red sandstone which stretches through the State, though considered 

 to belong to a lower horizon than the Potsdam sandstone of the New 

 York system. Analyses of the ores, by Dr. F. A. Genth, are appended. 



R. B. N. 



Hunt, Dr. T. S. A New Ore of Copper and its Metallurgy. Trans. 

 Amer. Inst. Min. Eng. vol. iv. pp. 325-328. 



Occurs in the clay-ore of Jones's Mine, Pennsylvania. Hitherto 

 known as a clay-carbonate, though on a quantitative examination it 

 WAS found to contain no carbonates, but to be a kind of copper-chlorite. 

 Its physical and chemical characters prove it a new species, for which 

 the name Venerite is proposed. Analyses, by the author and G. W. 

 Howes, given. E,. P. N. 



Hutchings, W. M. Notes on Mineral Analyses. Chem. JVeivs, vol. 

 xxxiv. no. 879, p. 141. 



Contains original analyses of chrysocoUa and " copper pitchblende " 

 imported into this country from Mexico for copper- smelting. [The 

 " copper pitchblende " is what is usually called " pitchy copper-ore " 

 (Kupferpecherz)]. P. W. E. 



Jones, Prof. T. R. On Quartz, Chalcedony, Agate, Flint, Chert, 

 Jasper, and other forms of Silica, geologically considered. Proc. 

 Geol. Assoc, vol, iv. no. 7, pp. 439-458. 



A resume of facts and inferences as to modes of origin. Ordinary 

 quartz and its varieties have been deposited by aqueous (probably 

 hydrothermal) agency. Chalcedony has been formed by water holding 

 silica in solution, derived immediately from the rocky matrix ; some- 

 times the silica seems to have replaced calcite or zeolites ; how far such 

 stones are due to gelatinous silica has yet to be determined. Plint 

 has usually been formed by the replacement by silica of detrital car- 

 bonate of lime. Siliceous replacement of the outer layers of carbonate 

 of lime has produced beekite, potato-stones, &c. Hornstone and chert 

 are of two kinds, one formed of grains of silica united by siliceous 

 cement, the other formed in the same way as flint. Jasper is usually 

 an altered clay. W. T. 



Kenngott, A. [Sicilian Sulphur.] iV^. Jahrh. Heft i. p. 41. 

 Note on specimens of sulphur and aragonite recently received from 

 Cinanciana in Sicily. 



. [Metaxoite.] N. Jahrh. Heft v. pp. 517-519. 



Suggests that the metaxoite of Lupikko, in Finland, is a doubtful 

 species. It is described as made up of a crystalline and an amorphous 

 substance, and is therefore not homogeneous. F. W. E. 



Kern, Sergius. On some recent discoveries of fields of Iron-ore in 

 the South of Eussia. Chem. News, vol. xxxiii. no. 842, p. ] 2. 



Gives analyses of iron-ore from the rivers Ingouletz and Saksagane. 

 The new fields of ore are estimated to contain 90 million tons of red 

 and brown haematite and magnetite. F. W. E. 



