Show dr method of codr some we interesting processes in obtaining distilled or lighter products from mineral oils have been described by dr laing of edinburgh before the royal scottish society of arts among these lie he names the arrangement of a still in such sucha a manner that the oil is continuously being distilled into itself until the required density is obtained dr laing showed that radiant heat is a powerful agent in breaking down oil vapors and can bo be utilized by passing the gazes gases as they leave the still through a at a high temperature re placed between tho the still and the condenser his ingenious method for distilling under pressure by means of which a hold is kept on all the considerable gases until liquefied he describes as consist ing of a relief tank interposed interpose il between the pressure valve and tho the condenser into in to which the gases escape as they come from the still the pressure here getting distributed over such a large area that it is practically reduced to nil the oil running to the receiver at ordinary atmospheric m mo asp I 1 pressure dr laings new form of still for preventing oils being broken down as in it distilli distilling nm for lubricating oils and wax is so BO constructed that the heavy residues which are continually forming under distillation are constantly being 0 removed from the source of heat ne new w york sun |