482 



TRANSACTION'S OF SOCIETIES. 



Lich. = Lichtenburg. 



Ly. = Lydenburg. 



Mg. = M"iddelburg. 



Mo. = Marico. 



Pa. = Pretoria. 



Pf. = Piet Retief. 



Pm. = Potchefstroom. 



R. = Rustenburg. 



Sd. = Swaziland. 



Sn. = Standerton. 



Wg. = Waterberg. 



Wit. = Witwatersrand (when used this refers to the old 



District which included Boksburg, Germiston, 



Johannesburg and Krugersdorp). 

 Wm. = Wakkerstroom. 

 Wol. =: Wolmaransstad. 

 Ze. = Zoutpansberg (East of the summit of the Drakens- 



berg and Houtboschberg). 

 Zw. = Zoutpansberg (West of the summit of the Drakens- 



berg and Houtboschberg), sometimes called the 



Pietersburg district. 



TRANSACTIONS OF SOCIETIES. 

 Chemical, Metallurgical and Mining Society of South Africa. — 

 Saturday, July i6th : J. Moir, M.A., D.Sc, F.C.S., President, in the chair. — 

 Presidential address : Dr. J. Moir. The author began his address with 

 some remarks on the nature of the scientific spirit, in the course of which he 

 referred to the dangers of over specialization and of the blind and dogmatic 

 worship of hypotheses. Reference was then made to the latest scientific 

 ideas in chemistry and in related branches of the other sciences. — " Notes 

 ■on precipitation " : F. D. Phillips. Results were given of the percentage 

 of extraction, in the case of strong, weak and slime extractors, the solutions 

 having been sampled at various times after dressing, on entering and leaving 

 the separate compartments, in order to discover what work each compartment 

 did, and whether it was possible to reduce the consumption of zinc. 



Geological Society of South Africa. — Monday, 2sth Julv : Prof. R. ±3. 

 Young, M.A., B.Sc, F.R.S.E., F.G.S., President, in the "chair.— " Petrological 

 description of the granite of Balmoral, Transvaal ; with notes on its position 

 in the new scheme of classification of igneous rocks proposed by American 

 authors " : A. Wade. The results of analyses of red Balmoral granite and 

 of Bushveld granite were compared with those of granites from Skiddaw, 

 Croghan Kinshela, and South-eastern Ireland, and the remarkable resem- 

 blances between the Skiddaw and Bushveld rocks noted. The Balmoral 

 granite is grouped under Alsbachase in the American scheme. — " The genesis 

 of the carbon in the Rand Banket " : C. B. Horwood. — " Notes on the 

 German South-West African diamonds " : Dr. C. Krause. The different 

 theories at present held were discussed, the author coming to the conclusion, 

 from the attrition of the diamonds, the peculiarities of the local gravels, the 

 existence of gravel waves, and other indications, that the source of the 

 diamonds was inland, and that they had been carried along an old river bed 

 into the oceair near Pomona. 



Royal Society of South Africa. — Wednesday, August 17th: S. S. 

 Hough, M.A., F.R.S., President, in the chair. — " The influence of uniformity 

 and contrast on the amount of light required " ; Prof. H. Bohle. The 

 physiological effects of radiation were considered, the destructive action ( f 

 excessive application of rays was dealt with, and conclusions drawn regarding 

 the requisite illumination under specified conditions. 



Cape Chemical Society. — Friday, August 26th : Prof. P. D. Hahn, 

 Ph.D., M.A., President, in the chair. — " Composition of milk in the Eastern 

 Province " : J. Muller. Results were given of a series of analyses of 

 milk conducted in the Eastern Districts of the Cape Colony and extending 

 •over a period of seven years. The figures were compared with those obtained 



