Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 403
domrubble work, uncoursed, Kg. 2990, the beds and joints are not dressed, projecting knobs andcorners are knocked off with the hammer, and the stones lie together at random, the intersticesbeing filled in with small spalls and mortar. No attention is paid to courses, though each stoneshould he… … courses (Fig. 2991), the work is brought to a level throughout its length at about every 12 or 14 in. inheight, so as to form courses of that depth. The work in each course is built random, and may con-sist of two, three, or more stones in depth, pinned in with spalls as before described.…
Mechanical engineering -- Dictionaries
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