A treatise on architecture and building construction (1899)
International Correspondence Schools · Scranton, The Colliery engineer co. · leaf 216
hich absorb moisturefrom the atmosphere and which swell in volume in conse-quence. Many attempts have been made to utilize thisproperty, to construct in-striiments which would in-dicate the density of themoisture in the air. Untilrecently not any have beenproduced which were accu-rate or reliable.… … 20 HEATING AND VENTILATION § 17 air in proportion to the density of the atmospheric vapor,and gives it off again as the density decreases. The mate-rial swells in proportion to the amount, of moisture which itholds, and thus the spiral which contains it is compelled tobend. 3G. The humidity of the…
Architecture · Building
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