Chicago : Engineering and Contracting Pub. Co. · leaf 90
3.—Chemical Store House, Water Purification Works, at Columbus, Chio. … Fig. 4.—Lime Saturators, Water Purification Works, at Columbus. Ohio. ENGINEERING & CONTRACTING Vol. XXXVI. Xo. I reason the water in the river varies in com-position and hardness from time to time. Forinstance, in November and December, follow-ing the long drouth of summer, the total hard-ness…
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![An illustration from The Mason Machine Works, Taunton, Massachusetts, U.S.A., inventors and builders of cotton machinery : Founded 1842 ; Incorporated 1873 ; [Catalogue] (1898)](https://img.insideoutlibrary.com/img/200/ia-masonmachinework00maso-21-7@90.webp)
