=Light slushing oil.=—The heavy petroleum oil similar to cosmic. Used as a rust preventive. Essentially a mineral oil containing a large per cent of rosin. Prescribed for use in the protection and preservation of all bright or unpainted of steel or iron on all parts of the equipment when the materiel is to remain unused for an appreciable length of time. Its use as a lubricant for mobile artillery is forbidden. Before applying the slushing oil to any surface, the parts should be thoroughly cleaned so as to be free from rust, coal oil, lubricating oil, et cetera, as their presence will cause rusting under the slushing oil. The slushing oil should then be applied in a thin, uniform coat, since this is all that is necessary to give good protection. Except in very cold weather it can be applied by using a paint brush as when painting, in cold weather it should be applied by stippling—that is, by holding the brush perpendicular to the surface to be coated and then tapping the surface with the point of the brush. It can be applied through the bore of the gun by a slush brush issued for that purpose. In cold weather it should be warmed before used in the bore of the gun. It may be readily removed by burlap or waste dipped coal oil. =Borax.=—Issued for use as a flux in welding. =Lavaline.=—A metal polish issued interchangeable with Gibson’s soap polish. Used on bits and collars. =Lye, powdered.=—When dissolved in water, one pound to six quarts with sufficient lime to give a consistence of paint, is used to remove old and blistered paint. =Napthaline.=—A moth preventive, effective only after eggs and grubs already present have been removed. Used in the storage of blankets, et cetera. =Polish, Gibson’s Soap.=—A metal polish issued interchangeably with lavaline. Used on bits and collars. =Paint, rubberine.=—Used in connection with loading ammunition in accordance with instructions regarding the same. =Primer, brown enamel.=—A hard, quick drying enamel used for painting parts of horse collars, draft springs, et cetera. =Sal Soda, Bicarbonate of Soda.=—A saturated solution of soda and water makes an alkaline solution that will not rust. The solution must be saturated, that is, at least 20% or one-fourth pound of soda (6 heaping spoonfuls to one cup of water). This solution is an effective solvent of powder fouling and should always be used after firing, whether metal fouling solution is to be used or not. It reduces the labor of cleaning with oil alone by more than half. Used also in a weaker solution (one-half pound to 8 quarts of water) in washing surfaces to be painted and to remove dirt and grease. =Soap, H. & H.=—A neutral naphtha soap used in washing blankets, web and cloth equipment. Applied in the form of a solution (one cake to 9 cups of hot water). If for any cause this soap is not obtainable, a good laundry soap (ivory or equal) may be used, but in no case should yellow soap containing a large percentage of alkali be used.