354 RECORD OF SCIENCE FOR 1887 AND 1888. 



WULF, Heinrich. Beitrag zur Petrographie des Hererolaudes in Siidwest-Afrika. 



Min. uud pet. Mittheilungeu, viii. Baud, III. u. iv. Heft, p. 193. 



Describes the rocks as granite, diorite, basalt, gneiss, mica and diorite schists, 



amphibolite, angite, gneisses bearing scapolite and wallastonite, augite schists, 



and granular limestones. 

 WtiLFiNG, E. A. Untersuchung eines Nephelinsyenit au8 dem Mittleren Transvaal, 



Siid-Afrika. Neues Jahrb. Min., Geol., etc., 1888, ii. Band, erstes Heft, p. 16. 

 Young, John. Quartz as a Rock- Forming Mineral, Traus, Geol, Soc. of Glasgow, 



188H-'87, 1887-'88, vol. viii, part ii, p. 278. 



