PH C. DAVISON. It is filled with concrete, through which iron bars are The increased use of concrete for building purposes * i t i m distributed as shown in Fig. 1. This concrete is then has taken rapid strides within the last five or six A NEW ICE-CONVEYING APPARATUS thoroughly tamped and allowed… … The scoops pass down between the one set The tensional strength of the steel or iron, of sprockets in a vertical position, and, while which is about 30 tons to ihe square inch, moving through the water in the tank, are increases the strength of the concrete about turned to a horizontal position to…
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