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Definition of chemicals:

  1. Substances used for producing chemical effects; organic chemistry, that which treats of the substances which form the structure of animals or vegetables, and their products; inorganic chemistry, that which treats of the substances which form mineral bodies; practical or applied chemistry, that which treats of the products of chemistry useful in the arts, and for economical purposes; pure chemistry, that which treats of the elemental constitution of substances, and of the laws of combination.

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