The geologic origin of the constituents of one hundred and fifty important industrial chemicals has been determined. The selection was made on the basis of quantity consumption, and their entry into a large variety of essential products. In the majority of cases one chemical is produced by the use of a group of other chemicals; therefore, the same raw materials enter into the manufacture of many industrial chemicals. This study shows the overwhelming importance of hydrocarbons, sulphur and sulphides, the haloid salts, and limestone.A point sharply brought out as a result of the study is the highly developed inter-dependence of all branches of the chemical industry, resulting in a definite trend towards the vertical type of industrial development, which includes the basic mining industries.

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