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MR. H. GARDINER LLOYD (Member), speaking as one who for many years had been engaged on the supervision of constructional work as well as laboratory work, first expressed agreement with Mr. Worsdale that metal and not wood should be used for moulds, and also pointed out that different results might be obtained in the compression test by using different packings between the cubes and the platens. He believed that a great deal of work had been done by the American Society for testing materials in this connection, and reference to that work would be helpful. Referring to Mr. Worsdale’s statement that, "if a cube face were seriously pitted, probably the best results could be obtained bv covering the surface with a layer of neat plaster, this being allowed to set, either between the plates of the machine or in contact with a plane glass or metal surface,” he said it should be borne in mind that this layer should be exceedingly thin, because if one put on a layer 1/4-in. thick, and the material happened to be weaker than the cube, the strength as indicated by the test would be much lower than if no such layer were used. One must be very careful to ensure that such a mistake was avoided. With regard to the concrete cubes mentioned at the top of page 360, which were tested in two different laboratories and yielded results which differed considerably, it woidd be interesting to know who had filled the moulds.
To the Editor of The Structural Engineer. Sir,-Our attention has been drawn to a paper entitled “Casing Piles, Damaged by Marine Worms, in Reinforced Concrete and Other Repairs at Swanage Pier,” by Major F. M. DuPlat Taylor, read before the members of the Institution of Structural Engineers, and published in the May issue of The Structural Engineer.
The new building of the Underground Railways Headquarters in Broadway, Westminster, has more than usual claims to distinction. In its planning, structural design and architectural grouping, it is probably the most notable building of modern times. With its central tower 180 ft. above pavement level, it is the highest commercial block in London, overshadowing that 12-storied aristocrat of residential buildings opposite (Queen Anne's Mansions), which for some three generations has enjoyed the distinction of being the highest inhabited building in the Metropolis. Much has already been published in the leading architectural journals, as well as in the daily press, concerning the building itself and its furnishings, but as so frequently happens, the treatment of the foundations and methods employed in erection of the framework have not perhaps received the studied attention desirable from the structural engineer's viewpoint. Hence the purpose of this paper, to endeavour to throw a little more light upon such matters. Before, however, passing on to the essentials, it will be as well to touch briefly on some leading features of the building which may assist in appreciating the importance of firm foundations for its support. M.J. McCarthy