The ordinary method for the separation of Iiquid and solid parts of o11s in the filtration and others that are originated for this special purpose,If however oils are separated before treatment into both parts and trea㌻ed in accordance with the properties of the怠eparated parts,they are used more effectively and more economicaIly than the original oils by themselves。Despite of the fact,t無e$eparation is applid only to the valuable oils. By utiliz三ng the different charges of liquid and solid parts,and by 玉mpressing the direct current high