100 ANNUAL OP SCIENTIFIC DISCOVERY. 



Lubricating Materials. Francois Moiifrant, of Paris, patentee. This 

 invention consists in the employment, for the manufacture of lubricating 

 materials of all fatty oils, (with the exception of coleseed oil,) which are 

 dis-acidified by means of milk, and are then caused to blend and intermix 



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with fat or a fatty body, by means of resin or a resinous composition. 



In preparing the said lubricating materials, the patentee employs a large 

 boiler or heating vessel, heated either by fire, or by steam, or hot air, or 

 otherwise. In this vessel, the oil to be operated on is placed, and heated 

 to such a temperature that the hand can just bear it when immersed. 

 The lard or other solid fatty body is then added, (care being taken to stir 

 the mixture well with a spatula from this time to the end of the operation,) 

 and also resin of the ordinary description, or resinous body, in the propor- 

 tions necessary to produce the several compositions hereinafter specified, 

 or other like proportions. When these two bodies are perfectly melted, 

 and an intimate commixture has taken place, pure fresh milk is added, in 

 the proportion of at least two pints for every 100 kilogrammes (220 Ibs. 

 about) of oil ; and the greater the impurity of the oil, the larger must be 

 the proportion of milk added to it. In the event of milk not being 

 procurable, the same proportion of albumenized w T ater, (prepared by adding 

 the white of one egg to a pint of water,) or of alkaline water, containing 

 five grammes,) (three and one-fourth dwts. of crystals of sub carbonate 

 of soda to a pint of water,) or even water alone may be used ; but milk is, 

 in all cases, to be preferred. The mixture is allowed to be heated to 

 boiling, or until the bubbling produced by the evaporation of the aqueous 

 matters has ceased ; and, in order to ascertain when the operation has 

 been carried on to a sufficient extent, a slice of new bread is placed in the 

 heating vessel ; and, when this well browned, the operation is complete. 

 It must be observed, that the stirring should be continued throughout the 

 operation ; and, in the case of the more solid compounds, even after the 

 boiling is completely finished. When the operation is terminated, as has 

 just been described, the mixture is allowed to repose for several hours, and 

 is then drawn off, before packing it for storage or use, by means of a hand- 

 pump or a common syphon. The results of the different operations 

 described are, that, by the boiling, all the moisture of the milk, and other 

 foreign bodies, is entirely dissipated as vapor ; and that the acid principles 

 of these substances, combined with the casein of the milk, are rendered 

 insoluble and precipitated, while the oil, separated from the deposit which 

 they form, contains no acid, and the deposit itself is, in some measure, 

 carbonized, and is easily removed from the vessel. All the products, by 

 being boiled together, are thoroughly incorporated ; so that there is no 

 danger of the lard arid oil becoming separated, a result to w r hich the 

 resin or resinous body undoubtedly contributes. If the operation is to be 

 carried on continuously, it will be needful to have tinned iron vessels, 

 into which the clear contents of the boiler can be transferred, to cool and 

 settle before being packed away. 



