1 The total output in 1910 was 9,951 short tons, valued at $1,002,010, an average of $100.69. These figures show a decrease in quantity and also a decrease of $6.86 per ton in the value as compared with 1909. These data are the last published figures. The outputs since 1910, while reported annually to the Geological Survey, are included with other lead pigments made direct from ore (chiefly leaded zinc oxides) in published statements in order to avoid disclosing individual returns. In general it may be said that the present productions are considerably in excess of the above figures. The price of sublimed white lead generally rules about 1 cent per pound lower than that of basic carbonate white lead. So far as reported, no basic sulphate white lead is either imported or exported (except, perhaps, in the form of ready-mixed paints). If imported, it would be classified with ordinary white lead, probably without question. There is one plant for making this pigment in England (Bristol Sublimed Lead Co.) and one in Australia. White lead-Production in United States-States and cities. a Production of white lead ground in oil, in paste form. 1 Mineral Resources. U. S. Geological Survey. 71, 643, 812 18, 141, 444 3,697, 702 White lead, prices wholesale, New York, spot, in cents per pound-Continued. COURT AND TREASURY DECISIONS. Decision under the act of 1894. Rates of duty, specific and ad valorem. 3 cents per pound. Do. 14 cents per pound. 23 cents per pound. 24 cents per pound. 25 per cent. Black pigment containing lead held dutiable as a pigment containing lead and not as pigment not specifically provided for. There being a doubt whether "white" describes and limits "pigment," the doubt is resolved in favor of the importer (T. D. 16819, G. H. 3338). MISCELLANEOUS. White lead (from official publications unless otherwise noted)-Trade of principal foreign LEAD ACETATE, LEAD NITRATE, AND OTHER LEAD COMPOUNDS, N. S. P. F. [Par. 57, act of 1913.] GENERAL INFORMATION. Lead, acetate of, white, and nitrate of, 14 cents per pound; acetate of, brown, gray, or yellow, 1 cent per pound; all other lead compounds not specially provided for in this section, 25 per cent ad valorem. DESCRIPTION. Lead enters into combination with most of the mineral and organic acids to form salts. Some 77 of these compounds are listed in the chemical dictionaries; but only two-lead acetate and lead nitrateare of any considerable commercial importance. These two salts are the only common compounds of lead that are at all readily soluble in water, and one or the other is generally employed when a solution containing lead is required. Lead acetate. The acetate of lead, Pb(C2H,O2)2.3H2O, often called 'sugar of lead" because of its sweetish taste, is the most soluble of the common salts of lead. It is found on the market as (1) "white, or pure acetate of lead, and (2) "brown" (also "gray" or "yellow"), which is more or less discolored by impurities. Each of these qualities is obtainable in two grades which differ in price by about 1 cent per pound. The more expensive quality of white acetate is known as crystals"; the corresponding grade of brown acetate is called 'granular. The cheaper quality of both grades is sold as "broken,' "Broken cakes." The best grade of white crystals contains practically the theoretical content of lead (54.7 per cent). Lead acetate is one of the most important salts of lead. It is used especially in the manufacture of paints and varnishes, in the preparation of alum mordants for dyeing cloth, and in hair dyes. It is a valuable reagent in the chemical laboratory and is used to a considerable extent in medicine. The basic acetate, Pb(C2H2O2)2. 2PbO.H2O is used to some extent for weighting silk. The latter is prepared from the normal acetate which, in aqueous solution, will dissolve lead oxide quite readily, forming basic acetates or subacetates which contain a higher ratio of lead to acetate than the normal salt. Lead nitrate. The nitrate of lead, Pb(NO3)2, crystallizes without water and contains, when pure, 52.9 per cent of lead. It is not quite so soluble as the acetate but it is frequently used instead of the latter, particularly in case its nitrate content can be utilized in making a valuable by-product, since, as a general rule, its lead content is less costly than the same quantity of lead in the form of acetate. The nitrate content has caused this compound to be used to some extent in the manufacture of matches. The main consumption, however, is in dyeing and calico printing, for the production of mordants, and in making chrome yellow (lead chromate pigments). 1 Generally as solution or paste containing the subacetate (Goulard water. Liquor plumbi subacetatis or Acetum Plumbum or Saturni) for the treatment of skin diseases and, internally, as an astringent. |