Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 401
rfect ventilationof the workings while the machines were in action. At other times, as afterthe explosioh of the charges, it was found desirable to allow a jet of air tastream out, in order that the smoke and carbonic acid gas should be quicklycleared away. Even had the work been done by manual… … Fig. 179.—Transit by Diligence over Mont Cenis. The experience gained in the progress of the work suggested from timeto time many improvements in the machinery and appUances, which finallyproved so effectual that the progress was accelerated beyond expectation.At the end of 1864, when the machines…
Inventions
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