San Francisco : Architect and Engineer, Inc · leaf 370
The Front Rank on the Firing Lme Foremost in the wartD air heating field is the Front Rankfurnace. A steel plate, boiler-like heater encased in asheet-iron jacket. Vapor pan automatically charges theair with the necessary moisture. Its high eflSdency at low cost of operation accounts for the… … INSULATED wires of so-caUed Codegrade are not necessarily of permanentcharacter. The Code sets no standards forresistance to age but requires only that insu-lation must meet certain tests when new.Consequently the lasting quality of anyCode grade wire depends upon the sincer-ity of the individual…
Architecture · Building
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