Burn, Robert Scott · London : Ingram, Cooke, and Co. · leaf 128
Base-lines, as c d, d e,should first be drawn, from which totake measurements. The representation given in fig. 114 is a combination of timbers calleda double flooring; a a being the binding joists, bb the bridgingjoists, and cc the ceiling j«oists. The lines 1 1, and those parallelthereto, are… … 120 ILLUSTRATED LONDON DRAWING-BOOK. both, the lines 1 1 are left-hand, and 2 2 right-hand isometrical lines, andare all put in by means of the ruler.
Drawing · Wood-engraving
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