Portland Cement

Reinforced Concrete. I have read that reinforced concrete structures were built by the ancients; in Rome, evidences have been found of these, and some of them I have seen myself. I do know that reinforced concrete of a kind was used in many buildings in this country prior to 1909, although not in quite the same manner as it is now used. W.T. Creswell

Mr. Jackson added to the paper the following extract from the Kelvin Lecture of last year, delivered by Professor W. L. Bragg to the Institution of Electrical Engineers :-

A British Advisory Committee has been formed to promote the interests of the International Association in this country. Professor Sir Thomas Hudson Beare is the British Vice-president, and a large number of eminent engineers in Great Britain have been elected to serve on this British Committee. The main activities of the latter are concentrated upon the part which will be taken by Great Britain at the Paris Congress in May, 1932. The two modes of construction, steel and reinforced concrete, are to be discussed at this Congress, and a preliminary scheme has been prepared by which certain themes will come under discussion. The following is a short summary of the themes which are to be dealt with at the Paris Congress :-