i 



70 GEOLOGY. 



Groddeck, A. von. Ucber die Lagerungsvcrhaltnisse des Oborharzer 

 Diabaszuges, und das Auftretcn von Posidonomyenschiefern dos 

 Culm siidostlich von demselben. [On Diabase-band and Culm- 

 slates of Upper Hartz.] Zeitsch. deutsch. geol. Ges. Bd. xxviii. Heft 

 2, pp. 361-368 ; 2 woodcuts. 

 Notes discovery of Fosidonomya Becheri in the Widerwag valley on 

 the S.E. of the band of Diabase and associated beds which belong to 

 the Devonian ; as the Culm also occurs on the N.W., a series of folds is 

 assumed and expressed in the sections given. The Culm and Devonian 

 are perfectly conformable. E. B. T. 



Groger, Fr. Zum Yorkommen des Quecksilbererzes. [The Occur- 

 rence of Quicksilver- ore.] Verh. k.-lc. geol. lieicJis. pp. 66-70. 

 A general sketch of the mode of occurrence of Quicksilver in the 

 different localities where it has been worked in Europe, America, 

 and the Malay Archipelago. The geology of Idria and other Krain 

 localities is compared with that of Almaden and New Almaden. 



G. A. L. 



Grotowsky, L. Der derzeitige Stand des Paraffin- und Mineralol- 



Gewinnung in der Provinz Sachsen. [Condition of the Paraffin 



and Mineral Oil Industry in Prussian Saxony.] Zeitsch. Berg-, 



Hiitt. Scdinenw. Bd. xxiv. pp. 351-401, pis. vi.-viii. 



The mode of occurrence, distribution, and chemical composition of 



the raw material used in the manufacture of paraffin by dry distillation, 



namely the so-called Pyropissite or Schweelkohl, an earthy lignite, are 



described in pp. 355-358. The rest has reference to the technical 



details of manufacture. H. B. 



Gruner, L. Observations sur la note de M. Mallard. [Remarks on 



M. Mallard's note (see Mallard, p. 92).] Bull. JSoc. Geol. France, 



3 ser. t. iv. pp. 73-82. 



Disagrees with M. Mallard's conclusions, and bases his opinions on 



observed facts, among others on comparative tables of temperature and 



rainfall in the Alps, prepared by Prof. Plantamour. G. A. L. 



Giimbel, Dr. C. W. Geognostiche Mittheilungen aus den Alpen : 



III. aus der Umgegend von Trient. [Alpine Geology : iii. The 



Trient district.] 5 pp. Munich. Noticed in Boll. 2i. Com. geol. 



Hal. t. vii. pp. 439, 440. 



Holds that the isolated Dolomite masses are not separate coral-reefs 



in place, but denuded parts of a continuous sheet ; also that the Bel- 



erophon-limestone is not Permian, but a repetition of a Pre-triassic 



fauna in Triassic beds, &c. E. B. T. 



Guillemin, P. Ascension du Chaberton. [Ascent of the Chaberton.] 



Ann. Oluh Alp. Fran^. 2 ann. p. 173. 

 Eefers to geological points. 



Gnmselius, 0. Nggra iakttagelser rorande Sveriges glaciala Yild- 



