The British Standard Specification for Portland Cement Again Needs Revision. - Othe National Standar

PART VI. Continued. As early as 1902 the present writer had realised that there was a scope for an Institution of Structural Engineers, which, under the aegis of the Institution of Civil Engineers, would do for specialised structural work, what the Institution of Mechanical Engineers, and the Institution of Electrical Engineers had done in their respective spheres. E. Fiander Etchells

Let C = the number of parts by weight of Dry Portland Cement. S = the number of parts by weight of dry sand. C = the percentage of water by weight required by the Portland cement. S = the percentage of water by weight required to damp the sand. W = the percentage of water by weight required by the combined weights of Portland cement and sand.

The subject of this paper is the strength of rectangular slabs, but it is limited to such slabs as have an appreciable thickness coinpared with the span, and more particularly it is limited to slabs of reinforced concrete only. A. Ingerslev