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… … DETAILS OF CONCRETE CHIMNEY but the fire-resisting qualities of coacrete the ice-particles into the pipe. PLAN AND ELEVATION OF THE MOLD AT ELIZABETHPORT, N. J. H901 SCIENTIFIC AMERICAN, INC.
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