Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 90
Fig. 41. Automatic Air-Valve. Closed by Expansionof a Piece of Vulcanite. Fig. 45. Automatic Air-Valve.Operated by Expansion ofDrum CDue to Vaporiza-tion of Alcohol withwhich it is PartlyFilled. in Fig. 44 is closed by the expansion of a piece of vulcanite insteadof a metal strip, and has no water…
Architecture · Building · Carpentry
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