H. W. Johns Manufacturing Co. · H. W. Johns Manufacturing Co. · leaf 29
H, W. Johns1 Patent Asbestos Materials. 30 the most effective appliance for these purposes previous to the introduction of our Asbestos Coverings, and so long as it re- mains uninjured, forms a desirable protection ; but, as is well … known, hair in contact with heated surfaces soon loses its vitality, and becomes a dry, crisped mass, possessing no non-conducting power, and often becomes ignited, and destructive to life and property. This charring and burning is effectually prevented
Paint · Asbestos · Roofing · Insulation
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