Incrustation Of Boilers

The proposed. plan of preventing the incrustration or corrosión of boilers by means of a certain enameling process has for some time engaged the attention of engineers, and favorable resulta are said to have attended its use. According to the acount given of this method, the interior surfaces are coated with a deposit in the form of a smooth black film of enamel, thiclr enough to protect the metal underneath from corrosión, and so thin that the boiler loses none of its steam generating power; the application is entirely simple, the material employee! being jectecf mto the boiler through a cocb of lubricator pattern at such times as desíred, the surface below the water level thus becoming coated with the enamel. It is claimed for this process, among its various advantages, that the enamel is impenetrable by acids, protects the boiler from the corrosiva agents contained in almost if not al! waters, prevenís incrustrations, does; not harm the boilers, and is of sligh'. cost.