l66 TRANSACTIONS OF SOCIETIES. 



if the amount of air stated by them had really been occluded in 

 the powder — 27 c.c. of air in 100 grammes — the latter would 

 undoubtedly have effervesced on being dropped into water, which 

 it did not. In respect of this salt the experiments of Guye and 

 Zachariades had been checked in his own laboratory, with totally 

 different results. He therefore concluded that by no means so 

 large an error can be ascribed to the occlusion of air, and was of 

 opinion that further comment on Guye and Zachariades' work 

 was superfluous in the absence of a detailed account of their opera- 

 tionsr-rncluding their actual weighings. 



In this connection it may be noted that Dr. J. Moir. of Pretoria, 

 m his paper on "A method of harmonising the Atomic Weights " 

 (Journ. Chem. Soc, Nov., 1909, p. 1752). observes : — 



" The idea now to be presented occurred to the author eighteen niontlis 

 ago, but as it gave an incorrect result when applied to Carbon as 12-00 

 (0=16}. it was not pursued further. The recent determinations, however, 

 oi Dr. A. Scott, give a value in agreement with the theory, and the author, 

 therefore, ventures to put it forward in a new form." 



Dr. Moir's calculated atomic weight for Carbon is I2"022. 



TRANSACTIONS OF SOCIETIES. 



Chemical, Metallurgical and Mining Society of South Africa. — 

 Saturday. November 20th : W. R. Dowling, Vice-President, in the chair. — 



Some experiments on Smelting Titaniferous Iron Ore " : Prof. G. H. 

 Stanley- Ores of this character have been usually looked upon by iron masters 

 as valueless on account of their refractory character and their incapability 

 of commercial blast-furnace smelting: several experiments were, therefore, 

 conducted with ores containing 1 5 per cent, of Titanium calculated as dioxide. 

 If the slags are calculated to form monosilicates with the silica equal in 

 proportion to Ti„0;i, they will be fusible and fluid. — " Treatment of Ore 

 Slime " : A. F. Crosse- Description of a method devised b}' the author 

 to overcome the difficulty of removing the dissolved gold from slimes that 

 have been treated with cyanide. This is done by treating the slime with 

 weak cyanide solution in a conical vat, a gentle upward flow, imparted to 

 the liquid by means of an air current, ensuring that the upper layer 

 of liquid is clear and so in fit state for precipitation, and capable of being 

 readily drawn off for that purpose. 



Addresses Wanted. 



The Assistant General Secretary (P.O. Box 1497, Cape Town) would be 

 glad to receive the correct addresses of the following members, whose last 

 known addresses are given below : — 



Boulton, H. C, c/o Messrs. Pauling & Co., Ltd., Broken Hill, Rhodesia. 



Brooks, Edwin James Dewdney, C.E., Public Works Department, Umtata. 



Brown, Walter Bruce, District Engineer, Cape Government Railwavs, 

 Craciock, C.C. 



Campbell, Allan McDowell McLeod, C.E.. B.A.. F.I.Inst.. Cape Govern- 

 ment Railways, Aliwal North, C.C. 



Champion, Ivor Edward, P.O. Roberts Heights, Pretoria (or 47 t. Currie 

 Road). 



Dickie, A., 475, Currie Road, Durban Natal. 



Gillispie, John, Railway Survey Camp, George, C.C. 



Hutt, Ernest W. , P.O. Box 2862, Johannesburg. 



Nichoi, William, Superinteirdent of Mines, De Beers Consd. Minv.--. Ltd., 

 Kimberley, C.C. 



Phillies, Geoftre\' John, Acting District Engineer, De Aar, C.C. 



