. Bulletin of the Department of Agriculture. Agriculture; Agriculture. §0 BULLETIN 145, IT. S. DBPAETMBNT OP AGRICULTURE. Table 6.—-Corrosive action of the preservatives. Preserva- tive Loss in weight of flange steel after immersion in preservative for 4 weeks at 98° C. in ounces per square foot per week. 1 o 3 4 5. 6 7, 8. 9 10 11 12 13 14 15 16 17 18 19 26 21 22 23 24 25 26 27 Coal-tar creosote Coal-tar creosote, Fraction I Coal-tar creosote, Fraction II Coal-tar creosote, Fraction III Coal-tar creosote, Fraction IV Coal-tar creosote, Fraction V Water-gas-tar creosote, Water-
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. §0 BULLETIN 145, IT. S. DBPAETMBNT OP AGRICULTURE. Table 6.—-Corrosive action of the preservatives. Preserva- tive Loss in weight of flange steel after immersion in preservative for 4 weeks at 98° C. in ounces per square foot per week. 1 o 3 4 5. 6 7, 8. 9 10 11 12 13 14 15 16 17 18 19 26 21 22 23 24 25 26 27 Coal-tar creosote Coal-tar creosote, Fraction I Coal-tar creosote, Fraction II Coal-tar creosote, Fraction III Coal-tar creosote, Fraction IV Coal-tar creosote, Fraction V Water-gas-tar creosote, Water-gas-tar creosote, .• Water-gas-tar creosote, S. P. F. carbolineum Avenarius carbolineum C. A. wood preserver Hardwood tar Wood tar (Douglas fir) Beech wood creosote Spirittine : Preservol Wood creosote oil Timberasphalt Copperized oil Fuel oil Kerosene Zinc chloride, percent Zinc sulphate, per cent Zinc sulphate (by-product), 7-2 per cent B. M. preservative, 2 per cent zinc and 1 per cent alum sulphate. Sapwood antiseptic Sodium silicate Sodium fluoride, 1 per cent Cresol calcium Less than Do. Do. Do. Do. Do. Do. Do. Between and Less than Between and Less than Between and Between and Between and Between and Between and No tests made. Between and Less than Do. Do. Between and Between and Do. Between and Not tested quantitatively; copper all thrown out in a few minutes. Decomposed at tempera- ture of test. Between and Less than Table 7.—Discoloration of wood treated with preservatives and painted. Preservative No. Preservative designated by cooperator as— Condition of painted surface after exposure for 1 month. 1 Very badly discolored and paint not dry. Slightly yellow in spots; paint dry. Very badly discolored; paint nearly dry. Do. 2 3 S Do. 6 Very badly dis
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