James F. W. Johnston, a Scottish chemist and agricultural writer, born in Paisley about 1796, died in Durham, England, Sept. 18, 1855. When a young man he supported himself by preparing students for the Glasgow university, and in 1825 he established a school at Durham. In 1830 he married, gave up his seminary, went to Sweden, and became a pupil of Berzelius. On his return he settled in Edinburgh, and was appointed chemist to the agricultural society of Scotland, filling' at the same time the office of lecturer on chemistry and mineralogy in the university of Durham. After the dissolution of the society he removed to Durham, and devoted himself chiefly to the composition of works on agricultural chemistry. He subsequently visited the United States and France. His works are: " Elements of Agricultural Chemistry and Geology" (8vo, Edinburgh, 1842); " Suggestions for Experiments in Agriculture" (8vo, 1843); "Catechism of Agricultural Chemistry and Geology" (16mo, 1844), translated and used as a school text book in most countries of Europe and America; " Lectures on Agricultural Chemistry and Geology " (8vo, 1844); " Contributions to Scientific Agriculture" (1849); "Treatise on Experimental Agriculture" (1849); "Use of Lime in Agriculture" (1849); "Notes on North America, Agricultural, Economical, and Social" (2 vols. 8vo, 1851); " Instructions for Analysis of Soils, Limestone, etc." (3d ed., 1855); and " Chemistry of Common Life" (2 vols., 1854-'5).