Twentieth century hand-book for steam engineers and electricians, with questions and answers .. (1905)
Swingle, C. F. [from old catalog], Horstmann, Henry Charles, 1858- [from old catalog], Tousley, Victor Hugo, 1875- [from old catalog] · Chicago, F. J. Drake & co. · leaf 165
the engine carefully untilthe crosshead completes the stroke and moves back onthe return stroke until the mark A is in line again.Make another mark on the rim of the wheel oppositethe marker at C. This position of the engine isshown in Fig. 30, and it will be seen that the crank isnow as much above… … FIGURE 30. engine a complete revolution until mark D comesopposite the pointer, Fig. 31, and the engine will beon the true center. At this point the question may arise, why not simplyreverse the motion and back the wheel up until themark D is in line with the marker? The answer is,
