The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 192
s h, B. The shell lac stem / is fitted intothe socket p by a little ordinary resinous cementmore fusible than shell-lac applied at m, m, in sucha way as to give sufficient strength and render theapparatus air-tight there, yet leave as much .is pos-sible of the lower part of the shell-lac stem… … also itself be exhausted and filled, that no variation of the gas in the interval0 may occur during the course of an experiment. The first substance submitted to examination was shell-lac, as comparedwith air. On making the experiment with all the care and attention that could bebestowed, an…
Architecture · Civil engineering · Science
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