354 RECORD OF SCIENCE FOR 1887 AND 1888. 



WULF, Heinrich. Beitiag zur Petrographie des Hereiolaudes iu Slidwest-Afrika. 



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



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



aiuphibolite, aiigite, gneisses bearing scapolite and wallastonite, augite schists, 



and granular limestones. 

 WtJLFiNG, E. A. Untersuchung eines Nephelinsyenit aus dem Mittleren Transvaal, 



Siid-Afrika. Nenes Jahrb. Min., Geol., etc., 1888, ii. Baud, erstes Heft, p. 16. 

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



1886-'87, 1887-'88, vol. viii, part ii, p, 278. 



