Let’s Keep ‘Em Puffing

By Merlin Elrod
Published on November 1, 1971

7650 Banks St., Justice, Illinois 60458

Water is never pure, except when made so in a laboratory or by
distillation; the impurities may be divided into four classes; 1.
Mechanical impurities. 2. Gaseous impurities. 3. Dissolved mineral
impurities. 4. Organic impurities.

(a)   Mechanical impurities may be both mineral and

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