Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 245
Fig. 170, Thermostat Operating through Expansion or Couiracliou of the Vapor of a Vohitile Liquid. to the damper should be used. By this arrangement the damperis held in such a position at all times as to admit the proper proportionsof hot and cold or tempered air for producing the desired…
Architecture · Building · Carpentry
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