Contractors' and Dealers' Association of California · San Francisco : L. A. Larson · leaf 372
EWS Recording H.v irronietcrs. These Hygrometers are built, upon the same principleas our Recording Thermometers except that they havetwo pens—one to record the diy l>ulb temperatures, andthe other the wet bulb tempfratures. The instrumenttraces upon the chart two distinct records and readingthe… … ing about it which will quickly deteriorate. It is made in both the self-contained and long distancetypes for any ranges between freezing and boiling i>ointsof water. If desired for test purpose, it can be supplied in aportable carrying case. They are being used extensively in mines, textile…
Architecture · Building · Construction industry · Engineering
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