Elementary building construction and drawing : stage 1 (1907)
Burrell, Edward J · London : Longmans Green · leaf 52
Stonework 41 The stones are roughly dressed, so that the beds and vertical joints are approximately horizontal and vertical. The different courses are not necessarily of the same height, but may vary from 8 to 14 inches, or thereabouts. Fig. 70. Ashlar. — In the most expensive walls the masonry is… … Fig. 71 strength depending on (i) the size of the blocks of stone used, (2) the accuracy of the dressing, and (3) the mode of bonding employed. With respect to the first of these no fixed rule can be laid down. It has, however, been given on good authority that
Building
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