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
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 … FIGURE 5. distance from the top of the bridge wall to the bottomof the boiler varies from eight to ten inches, depend-ing upon the size of the boiler. The space back of the BOILER SETTINGS AND APPURTENANCES 29 bridge wall, called the combustion chamber, can befilled in with earth or sand, and…
