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"The saddle boiler is a very efficient form, steady and sure in its working. in its improved forms it is, perhaps, the best for general purposes. It should be set over a furnace, the sides and end of which should be of fire-brick. It may be quite plain, or with the inner surface ribbed or corrugated." — Encyclopedia Britannica, 1893

Saddle Boiler

"The saddle boiler is a very efficient form, steady and sure in its working. in its improved forms it…

"The fire is made under the principal arch a; the flame and smoke return through the flue b, and then turn back over the top of the boiler to the outlet c, which can be placed at whatever point is in each case most convenient. The other parts referred to are d, flow pipe; e, return pipes, f, soot-door for cleaning flues, g, furnace door." — Encyclopedia Britannica, 1893

Saddle Boiler

"The fire is made under the principal arch a; the flame and smoke return through the flue b, and then…