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In this article the writer is dealing. with some additions to his previous, paper published in the April, 1925, issue of the "Structural Engineer." (Vol. III., Number 4). The underlying theory is given in that issue and is not repeated here.
The accompanying diagram provides an easy and rapid method for ascertaining the approximate number of concrete blocks or bricks contained in any shaped stack. It is assumed that the blocks or bricks are of a uniform standard size, so that the number
per cubic foot can be accurately computed. All that is then necessary to do is to measure the stack so as to ascertain its cubic contents in feet. This done, a straight edge is placed across the three columns in the diagram, regulated so that the right hand side touches the number indicating the cubic content of the stack and the left hand side touches the outer colulm at the point indicating the number of blocks or bricks in a cubic foot; the straight edge will at once show on the intermediate column the number of the articles in the stack.
Sir,-Mr. Arthur E. Pierce objects to the word " discarded " as used in my article, but
his objection is not relevant.