1:34 TRANSACTIONS OF SOCIETIES. 



TRANSACTIONS OF SOCIETIES. 



South African Association of Engineers. — Saturday, November 5 th : 

 J. A. Vaughan, Member of Council, in the chair. — " The ' Mederer ' Chilling 

 Chamber " : H. W. Miller. A description of a brick-work chamber 

 designed for the preservation of perishable foodstuffs and the cooling of 

 liquids. The bricks are perforated and especially shaped to permit the free 

 passage of air while absolutely excluding all light. The building has a series 

 . of concentric walls, the outer annular space being kept constantly cool by 

 means of water sprays. — " An economic aspect of mine labour as employed 

 on the Witwatersrand Mines " : P. Sno'wden. Suggestions for the 

 systematic supply of more nourishing and properly prepared food to natives 

 at work on the Mines. », 



South'^African Institute of Engineers. — Saturday, NovemberJi2th: J. 

 A. Vaughan, President, in the chair. — " Notes on Mine head-gears " : G. 

 Morris. An illustrated discussion of various features connected with 

 ]\Iine head-gears which contribute to render such structures most highly 

 -serviceable. The author dealt in detail with the materials, strength, size 

 and form of head-gears. 



Geological Society of South Africa. — Monday, November 21st: Dr* 

 E. T. Mellor, Vice-President, in the chair. — " The geology of a portion of 

 the Grootfontein District of German South-West Africa " : Dr. P. A. 

 Wagner. An account of a preliminary reconnaissance of the District, 

 •embodying brief information with regard to its physical features, but dealing 

 chiefly with the petrography of the area, the stratigraphical position of the 

 rocks of various series described, and the correlation of the Otavi system 

 with the geological formations of British South Africa. — " The correlation of 

 the Kheis series " : Prof. E. H. L. Schwarz. 



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 

 Isnown addresses are given below : — 



Bell, W. Reid, M.I.C.E., F.R.Met.Soc, M.I.E.S., P.O. Box 2263, Johannes- 

 burg. 

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

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

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

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

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

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

 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., Rretoria. 



