An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth (1888)
Gwilt, Joseph, 1784-1863, Papworth, Wyatt Angelicus Van Sandau, 1822-1894 · London Longmans, Green · leaf 700
eighs from 115- to 14 lbs. Slates of the usual thick-ness will not bear much heat before cracking: the thicker the slate the more readily do>sit crack with heat; and they will fly at once if cold water be poured suddenly upon themwhen in a heated state. 2211/. The Tavistock slates -were sold by… … to its durability; but being very heavy, proper preparation is needed for it, as timbers ofmuch greater scantling than usual are required. 2211 A. French slates, formerly used in London to some extent, are very light, andmust therefore only be used on boards; otherwise the wind would act upon them.…
Architecture · Architects
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