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 41
igh as thefire line, or about the center line of the boiler. Abovethis height the wall should be solid. Fig. 4 shows aplan and an end elevation illustrating this idea. Theends of some of the bricks should be allowed to projectat intervals from the outer walls across the air space,so as to come in… … FIGURE 4. fire comes in contact should be lined with fire brick,every fifth course being a header to tie the lining tothe main wall. Bridge walls should be built straight across fromwall to wall of the setting, and should not be curved toconform to the circle of the boiler shell. The proper -4
