262 MINERALOGY. 



Tichborne, C. R. C. Section of Baryta mineral exhibited at the 

 Dublin Microscopical Club. Quart. Journ. Micr. Sci. vol. xv. 

 p. 332. 



T. [Prof. Tschermak.] Bemerkung zu der Abbandlung iiber die 

 ¥oYm und Ycrwandlung des Labradorits von Yerespatak. [Remarks 

 on Memoir on Labradorite from Verespatak.] Min, Mitt. Heft i. 

 pp. 41,42. 

 Correction of statement in memoir on the alteration of the Veres- 

 patak labradorite. [See Geological Record for 1874, p. 254.] The 

 pseudomorphs consist mainly of potash-mica and pyrophyllite. P. W. B. 



. Anhydrit vom Semmering. [Anhydrite from the Semmering.] 



Min. Mitt. Heft iv. p. 309. 

 Note on the occurrence of anhydrite in gypsum at the Semmering, in 

 Lower Austria. 



Das Krystallsystcm des Muscovits. [Crystalline System of 



Muscovite.] Min. Mitt. Heft iv. pp. 309, 310. 



Optical examination of crystals of muscovite from the Lower Sulz- 



bachthal, in the Pinzgau, and from Bengal, point to the monoclinic 



system for the crystallization of this species. P. W. B. 



Tschermak, G. Apatit von Untersulzbach. [Apatite of Unter- 



sulzbach.] Min. Mitt. Heft iii. p. 208. 

 In exploring the epidote-locality of the Untersulzbach, some crystals 

 of apatite of unusual size have been found. They are colourless and 

 transparent, but usually contain fine acicular crystals of hornblende. 

 Their form is tabular through predominence of the basal pinacoid. 



P. W. B. 



Ulrich, G. H. F. [Australian Minerals.] N, JaJirh. Heft iii. pp. 



287,288. 

 Letter on discoveries in Yictoria, chiefly on Maldonite or bismuth- 

 gold (Au^Bi). 



lire, — . Dictionary of Arts, Manufactures, and Mines. By Robert 

 Hunt, F. W. Rudler, and many contributors. Ed. 7. 3 vols. 8vo. 

 London. 

 Contains throughout notices of minerals used in the arts, classified 

 alphabetically. 



Velain, Ch. Analyse des de'gagements gazeux de I'ile Saint-Paul. 



[Analysis of the Gaseous Emanations of St. Paul's Island.] Compt, 



Rend. t. Ixxxi. pp. 332-335. 

 Analyses of gas from various spots on the island, and of sea-water, 



Vennor, Henry G. Notes on some of the Galena or sulphuret of 

 lead deposits connected with the Laurentian rocks of Ontario. 

 Canad. Nat. n. s. vol. vii. pp. 455-462. 

 The galena occurs in true veins, which traverse great areas of the 

 crystalline Laurentian limestones. 



