278 TRANSACTIONS OF SOCIETIES. 



TRANSACTIONS OF SOCIETIES. 



South African Institute of Engineers.— Saturday. February nth: 

 J. A. Vaughan, President, in the chair. — "Borehole Deflections": J. S. Curtis. 

 — The author described observations and experiments which strengthened 

 him in conclusions previously published, to the effect that deflection of bore- 

 holes is due to the magnetization of the drill rods resulting from their 

 revolution in the terrestrial magnetic field. 



South African Society of Civil Engineers.— Wednesday. March 8th:- 

 Col. G. T. Nicholson. M.I.C.E., President in the chair. — Presidential address: 

 Col. G. T. Nicholson. — The problems connected with dock engineering were 

 dealt with and the relative merits of hydraulic and electric equipment were 

 discussed, the latter being considered more economical. 



Chemical, Metallurgical and Mining Society of south Africa. 

 — Saturday, February 18 : Dr. J. Moir, M.A., F.C.S., President, in the chair. 

 — " Profit per fathom ": R. E. Saw>er. Notes supplementary to the argU' 

 ments put forward by Marriott in favour of his fathomage system in the 

 S.A. Milling Journal of March, 1910.—" Practical notes on coal": M. Dodd. 

 A discusssion of the composition, classification, uses of different sorts, and 

 selection of coal in connection with mining operations.— " Faulting phenomena 

 in Rand Mines " : G. H. Beatty. An exposition of and comment upon certain 

 examples of complicated faulting that had come under the author's notice. 



ADDRESSES WANTED. 



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

 clad to receive the correct addresses of the following members, whose last- 

 known addresses are given below : — 



Bay, Dr, B., P.O. Box 5513, Johannesburg. 



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



Bj-own, W. B., CO Engineer in Chief, S.A. Railways, Cape Town. 



Champion, Ivor Edward, P.O. Roberts Heights, Pretoria. 



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



Leech. Dr. J. R.. 4th Avenue. Melville. Johannesburg. 



INIacfarlane, Donald, M.I.C.E., H.INL Naval Dockyard, Simonstown, Cape, 



Mirrlees, W. J., 9, London Chambers, Durban. 



Nichol, Thomas Thompson, P.O. Box 34, Springs, Transvaal. 



Nicholas, W. H., Durban High School, Durban, Natal. 



Nicholson, J. Greg, Leliefontein, Government School. P.O. Carolina- 



Transvaal. 

 Pakes, Dr. A. E. H., P.O. Box 5, Belfast, Transvaal. 

 Petersen, H. T., P.O. Box 5, Cleveland, Transvaal. 

 Preston, James, 89, Arnold Road, Observatory, near Cape Town, 

 Southwell, Miss Jessie, 270, Visagie St., Pretoria. 

 Van Oordt, J. F. Harrismith, O.F.S. 



