Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 388
Fig. 89. Gas Heater witU Automatic Mechanism for Controlling Hot Service. View at Right Shows Interior Coils. cients of ex-pansion, and so arranged that the difference in expansionwill produce sufficient movement to open a small valve when thewater reaches a given temperature. This allows water…
Architecture · Building · Carpentry
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