H. W. Johns Manufacturing Co. · H. W. Johns Mfg Co. · leaf 15
!4 H. W. JOHNS MANUFACTURING CO. "NATIONAL" COVERING. (patented.) For Use where 85 lbs. or less Steam is Carried. This Covering is … gations in the alter- nate layers of felt, the sections, are full of confined air spaces, forming a covering unsurpassed for ordinary steam pressure. It is highly ornamental in appearance, and is therefore par- ticularly desirable for public buildings, hotels, etc. Elbows, Tees, etc., to match.…
Asbestos · Insulation · Paint · Roofing
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