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 138
L<? Fig. 49 … Fig. 50 at right angles, as shown in Fig. 49. The distance O-Bshould equal that from the rear wall to the boiler head,and the height, O-A, should be about equal to O-B, andshould bring the point A about two inches above the top 126 Steam Engineering row of tubes. The clamp thus formed is filled…
