Abstract
Introduction. Some influences of the war on the supply of fertilizer materials, 391. — I. Classification and uses of nitrogen compounds, 394. — II. Sources of fixed nitrogen: Chilean nitrate, 398; coal, 401; air, 404. — III. The fixation of atmospheric nitrogen by chemical processes: arc process, 405; cyanamid process, 408; Haber process, 410; cyanide process, 414. — Summary of the situation at the outbreak of the war, 416. — IV. Developments in nitrogen fixation since the outbreak of the European war: Norway, Sweden, and Switzerland, 417; Germany and Austria, 418; Japan, Italy, France, and Great Britain, 420; United States, 422. — V. The future policy of the United States, 428.
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