242 MINERALOGY. 



of the elementary substances. This is followed by a classified list of 

 general preliminary reactions ; after which comes a systematic descrip- 

 tion of the blowpipe-reactions which characterize the principal mineral 

 species. A list of minerals, with their hardness, specific gravity, and 

 crystallographic systems, is appended.. F. R. 



Fuchs, Dr. C. W. C. Anleitung zum Bestimmen der Mineralien. 

 [Guide to the Determination of Minerals.] 2 Aufl. Marburg. 



Gage, James R. On the occurrence of the Lead Ores in Missouri, 

 Trans. Arner. Inst. Min. Eng. vol. iii. pp. 116-125, with 8 figs. 



Only the S.E. part of Missouri is described. The ore occurs in 

 magnesian limestone, of which analyses are given. It is found dis- 

 seminated through the rock, or deposited in flat sheets or in fissures, 

 some vertical and others horizontal ; the galena likewise occurs embedded 

 in the superficial soil, forming " float mineral." In Moniteau Co. the 

 galena forms veins in coal. P. W. R. 



Garnier, J. Les Mineraux dans la Nouvelle Caledonie. [Minerals 

 in New Caledonia.] Moniteur de la Nouvelle Caledonie., January 6. 



Gautier, M. Note on the Dephosphoration of Iron Ores by Jacobi's 

 Process at the Kladno Ironworks, Bohemia. Mem. Soc. Civ. Eng. 

 May 7, pp. 142-151. Abstract in Proc. Inst. Civ. Eng. vol. xlii. 

 pp. 366-:i69. 



Analyses given. 



Genth, Dr. F. A. On the Mineralogy of Pennsylvania, being Report 

 B of the Second Geological Survey of Pennsylvania, 1874. With 

 an Appendix on the Hydro-carbon Compounds, by S. P. Sadtter. 

 Pp. 206. Barrisburg. 



Gibb, Thomas. The Extraction of Silver from Cupreous Iron-pyrites. 



Chem. News, vol. xxxi. pp. 165, 166. 

 Gives percentage of copper and silver in pyrites from Rio Tinto, 

 Tharsis, and San Domingos. 



Goodchild, J. G. Wulfenite at Caldbeck Pells. Geol. Mag. dec. ii. 

 vol. ii. pp. 565, 566. 



Calls attention to the occurrence of wulfenite in the Caldbeck Pell 

 Mines in Cumberland, where it is associated with anglesite, pyro- 

 morphite, and other ores of lead. Hausmannite has also just been 

 detected in the Haematite-mines of the Cleator district, West Cumber- 

 land. J. G. G. 



Gould, C. Note upon a Recent Discovery of Tin-ore in Tasmania. 

 Quart. Journ. Geol. Soc. vol. xxxi. pp. 109, 110. 



The ore is not " stream-tin " in the true sense of the word ; but the 

 disintegration of veins and strings running through the porphyritic rock, 

 of which the mount is composed, gives rise to a shallow surface-drift 

 from which the tin-ore is procured. Lodes in adjacent slaty rocks 

 contain antimony and zinc-blende. R. E., Jun, 



