Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise .. (1916)
Swingle, Calvin F. (Calvin Franklin), b. 1846 · Chicago, F.J. Drake & company · leaf 137
ele-vation illustrating this idea. The ends of some of thebricks should be allowed to project at intervals from th( 123 124 Steam Engineering outer walls across the air space, so as to come in touch withthe inner walls. Where boilers are set in batteries of two or more, themiddle or party walls… … U
