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Sir,-I think Mr. Gray is hardly fair to the theory of the water-cement ratio. Professor
Abrams only tries to deal with one variable at a time; and his statement is that, other
from remaining unaltered, the lower the water-cement ratio, the higher the strengthas
long as the mixture remains workable. He stresses the qualification, to which he attributes the downward droop of the curve at low ratios. The qualification has had results of practical value in leading to the development of vibrating machines.
Mr. C. J. JACKAMAN proposed a hearty vote of thanks to Mr. Mears, and commented upon the Institution’s good fortune in having secured a paper so novel in character.
Sir Thomas Hudson Beare, in his Presidential Address, thanked members of the Branch for
doing him the honour of electing him Chairman, and then referred to the formation of the Branch on October 16th last, when the President and Secretary were present. He then went on to say that his presidential address would be more or less in the nature of an informal talk, and that it seemed to him that looking back over fifty years of professional life a resume of the developments in Structural Engineering might prove of
Professor Sir Thomas Hudson Beare