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A catechism of the steam engine in its various applications to mines, mills, steam navigation, railways, and agriculture. With practical instructions for the manufacture and management of engines of every class (1864)

Bourne, John · New York, D. Appleton & co. · leaf 54

An illustration from A catechism of the steam engine in its various applications to mines, mills, steam navigation, railways, and agriculture. With practical instructions for the manufacture and management of engines of every class, 1864, leaf 54
by means of a chain with the dam-per. If the pressure of the steam rises,the float will be raised and the damperclosed, whereas, if the pressure in theboiler falls, the reverse of this action willtake place. 90. Q.—Are all land boilers of thesame construction as that which you havejust described ?…

Steam engineering · Steam-engines

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