lONERALOQT. 245 



Hughes, John. Note on the Analysis of Cambridge Coprolite. Chem. 



News, vol. xxxi. p. 209. 

 Contains analyses of coprolite from Cambridge and Charleston. 



Hull, Prof. E. Crystals of Olivine from Vesuvian Lava and Irish 



Basalt. Qiuirt. Micr.Jouni. vol. xv. p. 411. 

 When polanzed, thin slices of the former mineral gave a rich play of 

 colours, while those of the latter only gave feeble tints. Prof. Hull 

 thinks that in nearly all cases the interior of the olivine crystals in the 

 Irish rocks has become replaced by some chloritic or other mineral. 



E. T. N. 



Janettaz, Edouard. Xote sur des Minerals de Cuivre de la Nouvelle- 



Caledonie. [Copper-ores from Xew Caledonia.] Bull. Soc. Geoh 



France^ 3 ser. t. iii. pp. 54, 55. 



Notices especially an ore consisting of black, friable, earthy matter, 



essentially composed of sulphur and copper. It is a mixture of earthy 



chalcosine, limonite, and a little iridescent copper-sulphide. Cuprite in 



crystals or in small nodules occurs associated with this ore. G. A. L. 



Janovsky, J. V. Zur Kenntniss des Cronstedits von Pribram. 



[Cronstedite from Pribram.] Journ. prakt. Chem. N. F., Bd. xi. 



pp. 378-384. 



Two analyses of well-crystallized Cronstedite from Pribram, in 



Bohemia, led to the foUowing formula :—\0^ . SiO^ + 3R0 . SiO.^ + 4Aq ; 



where Rfi^ = Fe^Og ; and RO = FeO, MnO, and MgO. The composition 



is therefore different from that which had been deduced from previous 



analyses of the mineral from this locality. F. W. R. 



John, K. Thomsonit und Amphibol vom Monzoni. [Thomsonite and 



Hornblende from Monzoni.] Verh. h-Tc.geoh Reichs. pp. 305-306. 



Analysis adduced, proving the Monzoni mineral to be Thomsonite : 



another analysis of a dichroic mineral proves the latter to be actinolite. 



Jones, Prof. T. R. Lecture on flint, agate, jasper, and other kinds 

 of silica. 5th Ann. Rep. Wellington Coll. Nat. Sci. Soc.i^}). 47,48. 



Kaemmerer, Hermann. Ueber den Chromgehalt des Smirgel und 

 des Bolus. [Chromium in Emery and Bole.] Journ. prakt. Chem. 

 N. F., Bd. xi. p. 79. 



Note on the occurrence of a small proportion of chromium in emery, 

 and of traces of the same element in bole. 



Kalkowsky, Ernst. Ueber den Salit als Gesteinsgemcngtheil. 



[Salite, as a Rock-constituent.] Min. Mitt. Heft ii. pp. 45-50 ; 



woodcut. 



Describes the occurrence of Salite (variety of augite) as an essential 



constituent of various crystalline schistose rocks. Thus it occurs in a 



chloritic gneiss, between Liebau and Schmiedeberg, in Silesia. The 



mineral appears in the form of prisms, granules, and microlites. Several 



rocks containing salite are mentioned, and their localities given. 



F. W. R. 



