86 NEW BOOKS. 



(i) nepheline syenites and phonolites, (2) alkali syenites and trachytes. 

 The rocks are probably considerably younger than any of the sedi- 

 mentaries of the Waterberg formation. 



South African Institution of Engineers. — Saturday, September 

 14th : Mr. J. A. Yule, President, in the chair. — " Electric hoists in head- 

 gears " : S. E. Boult. The author considered the subject of winding 

 mainly from the point of view of the cost of installing and maintaining 

 electric hoisting plant and the ease of control, with a view to prevent 

 overwinds and to secure even winding. 



Cape Chemical Society. — Friday, August 30th: Dr. C. F. Juritz, 

 M.A., F.I.C., President, in the chair. — " Thoric dioxide in South African 

 monazites " : Prof. P. D. Hahn. The author gave an account of the 

 occurrence of monazite at Embabaan, Swaziland, and at Houtenbeck, 

 Transvaal, the former of which contained 6.66 per cent., and the latter 

 3.23 per cent, of thoric dioxide. In both cases the monazite was strongly 

 radioactive, and this was also the case with two specimens of euxenite 

 from the Transvaal, which contained respectively 1.54 and 2.04 per cent, 

 of uranic oxide. — " Seasonal variations in composition of Cape Peninsula 

 and Kimberley milks " : Dr. C. F. Juritz. Results of analyses of 4,755 

 milks from the Cape Peninsula and of 812 from Kimberley, extending 

 over the last seven years, were tabulated in monthly, quarterly, and yearly 

 series. The range between the minimum and maximum monthly means 

 was considerably more at Kimberley than in the Peninsula. Fat was at 

 a maximum in both localities simultaneously, but solids-not-fat at different 

 periods of the year. At both places the fat was at a maximum at the 

 beginning of the cold season, i.e., contemporaneously, while the solids-not- 

 fat was highest at the commencement of the rainy season, which did not 

 synchronise for the two places. — " Agricultural soils from La Dauphine, 

 French Hoek " : Prof. B. de St. J. van der Riet. The results of analyses 

 of six soils from the Paarl Division were stated and discussed. These 

 soils were from fertilised vineyards, and derived principally from the Table 

 Mountain sandstone formation. 



NEW BOOKS. 



Colvin, Ian D.-T/ir Cape of Adventure: being the strange and notable 

 discoveries, perils, shipwrecks, battles upon sea an land, with pleasant 

 and interesting observations upon the country and the natives of the 

 Cape of Good Hope. 8vo., pp. xxxv, 459. Map and Ulus. London: 

 T. C. & E. C. Jack. 1912. tos. 6d. 



Stevenson-Hamilton, J.— Animal Life in Africa. 8vo. (g\ in. X 6 in.), 

 pp. xvii, 539. Thus. London : W. Heinemann. 1912. 40 oz. 18s. 



Young, T. — Short history of South Africa and its people for the use of 



schools. 8vo., pp. 223. Maps. Cape Town : T. Maskew Miller. 14 oz. 



Knox, A. —The climate of the continent of Africa, pp. xiv, 552. Ulus. 

 Cambridge University Press. 191 1. 21s. 



Moubray, J. W..—In South Central Africa : being an account of some 

 of the experiences and journeys of the author during a stay of six 

 years in that country, gin. X5^in., pp. xvi, 198. Map and Ulus. 

 London: Constable & Co., 1912. tos. 6d. nett. 



