Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 137
le-vation illustrating this idea. The ends of some of theoricks 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 moi e, themiddle or party walls…
