Modern Developments in Surface Treatment

Although refrigeration is a comparatively new science it has made enormous strides in the last quarter of a century, and is rapidly becoming an indispensable factor in the life of civilised communities. Edgar A. Griffiths

SEWERAGE may be defined as the removal,by means of pipes, culverts or other channels, of waste water containing in varying quantities organic and inorganic matter in suspension and solution; and a sewerage system may have to deal with any one or any combination of the three following constituents:- l. Domestic Sewage. 2. Storm water from wholly or partially impermeable surfaces in built-up areas. 3. Trade wastes. A.H.S. Waters

The PRESIDENT, in introducing Mr. Tapsell, said that his paper was an extremely interesting one on rather a new subject which the author had been investigating at the National Physical Laboratory. He was very sorry, and apologised to Mr. Tapsell that so few members had turned up that evening, but the possibility was that, this being such a new subject, they had not realised its importance even in the everyday use of metals.