Take some resin oil, and after having allowed it to settle for a short time, boil it in a copper kettle with a hundredth part of its weight of slacked lime, it is then to be poured out quite hot into vessels, when a separation of all extraneous matters takes place. Eight gallons of this oil are heated in a cast-iron boiler, to which are added fifty-five pounds of slacked lime that have been passed through a very fine wire, and to be stirred up the whole time of pouring it into the vessel. Oil and lime are added in the above proportions until the boiler is full. This is heated until the water of the lime has evaporated, which can be known from the appearance of the substance resembling that of liquid chocolate. When this is done, five gallons of resin oilMd about four Ibs., of this lime paste are poured into a copper basin with handles. The' mixture is well shaken and poured off into vessels. By thisa good composition for oiling ma- i-!iiiu-:-y !« obtained. In an additional patent the inventor adds a little tar oil (naphtha), particularly when it is required to oil large machines. Another receipt of the same inventor consists in adding 2£ gallonsof oil to 1! Ibs. of some oleaginous substance. Shake thl\; up and add the • same quantity of slacked lime, pre- viQusly boiled with oil which has been made anhydrous. The mixture is well shaken and kept in vessels for use.
This article was originally published with the title "New Lubricating Materials"