MLNEBAL06T. 256 



pt. 2, p. 64 (translated from Jahrb. k.-k. geol. Reichs. xxiii. 



no. 2, p. 136). 

 A notice of specimens (exhibited by Dr. Oldham in the Vienna 

 Exh.) of a mixture of sylvino (KCl) and kiescrite (MgSO^) from the 

 Salt range of the Punjab. F. D. 



Vala, Jos., and R. Helmhackee. Ueber Delvauxit. Arch. nat. 



Land. Bohm. Bd. xi. Abt. 2, Th. 1, p. 381. [Noticed inN. Jahrb. 



1875, p. 317.] 



Describes the occurrence of Delvauxite in Bohemia. The composition 



of the mineral, dried over chloride of calcium, is given as 2CaO.P20, 



+5FeA. P2<^6 + 16HA or as CiiO+2FGfi^ + l^fl,-]-7B.fi. 



F. W. R. 



Yelain, Ch. Sur un feldspath orthoclase vitreux des pouzzolanes do 

 I'ile Rachgoiin (Algerie, province d'Oran). [Vitreous orthoclase 

 from the puzzolanas of Rachgoun Is.] Compt. Rend. t. Ixxix. 

 pp. 250-251. 

 This felspar is found in rounded tabular crystals with a rolled ap- 

 pearance, or oftener in rounded crystalline masses, disseminated in the 

 midst of volcanic scoriae and reddish puzzolanas, accompanied by 

 crystals of pyroxene, having also a rolled aspect. This vitreous ortho- 

 clase has the peculiarity of being twice as rich in soda as in potash. An 

 analysis is given. G. A. L. 



VoELCKER, Dr. A. Composition of a sample of Bordeaux Phosphate, 



Joum. Roy. Agric. Soc. scr. 2, vol. x. p. 283. 

 A detailed analysis is given ; the sample contained 33*72 per cent, 

 of phosphoric acid. 



Websky, Prof. Ueber einige bemerkenswertho Vorkommen des 



Quarzcs. [Remarkable occurrences of quartz.] N. Jahrb. Heft 



ii. pp. 113-130, with plate (crystals). 



Crystallographic description of remarkable specimens of quai'tz from 



Neuhaus, near Waldenburg, Silesia, from Oberstein on the Nahe, from 



Baveno, and from Traversella in Piedmont. F. W. R. 



Weisbach, Prof. A. Notiz iiber den Roselith. N. Jahrb. Heft i. 



pp. 46-48. 

 Announces the recent discovery of the rare species Eoselite at Schnee- 

 berg, in Saxony. 



. Luzonit. Min. Mitt. Heft iii. pp. 258, 259. 



Describes, under the name of Luzonite, a mineral from the copper- 

 veins at Mancayan, in the Isle of Luzon. It occurs chiefly as a com- 

 pact, dark grey, metallic mineral, associated with enargite, and having 

 a similar composition, an analysis leading to the formula CU8ASS4. 



F. W. R. 



WiBEL, F. Ueber Guanovulit, ein neues Mineral in den Vogeleiom 



des Peru-Guanos. Ber. deutsch. chem. Ges. pp. 392-396. 

 Oiumovulite is a crystalline body found in the remains of birds' 



