quired. The material is so fluid that it is practically piece, having the shape of the cavity cut out of it, the partment of the tank is filled with alcohol, and in impossible to make an open cut even 60 feet deep for the approaches.—Hngineering News. 0+ 6+e—_______ AN IMPROVED CHURN. The… … vacuum, which causes the mercury to rise in the tube CAMPBELL’S CHURN. to a considerable height. Campbell, of Mancelona, Mich. The base is made in In Fig. 5 is shown a tank containing four liquids of two parts for convenience in shipping, and on the base different densities, the densities…
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