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Updated: May 5, 2025
The regular working of the machinery was aided by the employment of a balance-beam connected by a chain with the head of the large piston and pump-rods; and the whole of these powerful machines by means of three of which as much as 789,840 gallons of water were pumped out of the mines every 24 hours were set in operation and regulated merely by the turning of a stopcock.
He could not possibly perceive when his balance-beam was out of its centre, and if he had seen a slight leaning to one side, and that side not his own, he could not have conceived that the scales of justice would have been very much affected.
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