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 22
he shell,the whole contents of the drum being equally divided be-tween steam and water. The tubes extend through the tube sheets into whichthey are expanded with roller expanders; opposite the endof each and in the head plates is placed a hand hole ofslightly larger diameter than the tube, and… … Fig. 6 detail of water-leg, hand hole plates and yokes, etc., of heine boilers 12 Steam Engineering
