on obtained by fastening cast pattern plates against one disturbed. which renders it possible to tamp in the most advan- side-plate of the mold. By a similar means blocks The twentieth annual report of the commissioners with curved or grooved ends or with faces of different tageous manner. Fig. 2… … is in contem- block. plation. The P'ig. 8.—Making Concrete Fence Posts. Special time- Fig. 7.—The Dayton Machine. commissioners saving features consider that the public agitation to restrict the fur- mechanism is controlled by levers which are simply have been adopted by the various manufacturers,…
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