Special test on white base of the following composition, in pure linseed oil: Asbestine 10% Corroded white lead 20% Sublimed white lead 30% Zinc oxide 40% Upper board of panel reduced with straight turpentine on priming coat. Second board of panel reduced with wood turpentine on priming coat. Third board of panel reduced with pine oil on priming coat. Bottom board of panel reduced with petroleum spirits on priming coat. No. 45 Same pigment formula as No. 44, reduced with: Pine oil 50% Linseed oil 50% No. 46 Special test of white base of the following composition, in pure linseed oil: Corroded white lead 20% Sublimed white lead 30% Zinc oxide 35% Asbestine 15% No. 47 Cypress panel unpainted. No. 48 Cypress panel painted with formula No. 1, thinned with benzol on the priming coat. CHAPTER XV CEMENT AND CONCRETE PAINT TESTS =Damp-proofing and Waterproofing.= The decoration and preservation of cement and concrete is a subject which is being given the careful consideration of many technologists on account of the wide usage of cement for structural purposes, and the necessity of properly guarding it against the destructive effects of moisture. To obtain with various paints decorative effects, and, at the same time, provide a high degree of damp-proofing, is a process quite distinct from that of water-proofing cement and concrete superstructures. The use, in small percentage, of stearic acid solutions, aluminum stearate, marine animal soaps, and other lime-reacting materials, as a component of concrete while it is being mixed, has been in practice for some time, the resulting mixture being used largely upon base-work subjected to water under high pressure. Although some of the materials used for such purposes actually do give to the concrete a high power of water resistance, the degree of waterproofing to be obtained through the use of many such compounds varies to a wide extent, often interfering with the lime-silica reactions, and ultimately affecting the strength of the finished concrete.