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Updated: August 3, 2024
There is new matter on each one of the pp. 132-139, while almost the whole of pp. 147-152 inclusive, and the whole of pp. 211-216 inclusive, are spurious that is to say, not what the purport to be, not translations from an article that was published in February 1879, and before "Evolution, Old and New," but interpolations not published till six months after that book.
If the steam ways, valve chest, and steam pipe also are jacketed, an increase in efficiency will be gained, though perhaps somewhat at the expense of appearance. Boiler. The boiler described on pp. 211-216, or a vertical multitubular boiler with about 800 sq. inches of heating surface will drive this engine satisfactorily.
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