Journal of the Franklin Institute; devoted to science and the mechanic arts (1826)
Franklin Institute (Philadelphia, Pa.) · Oxford, Eng. [etc.] Pergamon Press [etc.] · leaf 22
operation have been proportioned as follows, viz. thelower valve, «, has been two inches in diameter, while the valve ofthe piston P itself was three inches. The square of three being nine,and the square of two being four, the ratio of the pressures will be asnine is to four; hence the piston being… … Fig. 3 represents a transverse section of seven* boilers, on the cen-tre one of which the hydrostat is placed. As the fire of the furnacenever rises higher than the centre of the boilers, represented by thedotted line 0 L, O L, &c. it is evident, if the boilers were three feetin diameter, that…
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