Modern instruments and methods of calculation : a handbook of the Napier Tercentenary Exhibition (1914)
Horsburg, E. M. (Ellice Martin), Napier Tercentenary Exhibition (1914 : Edinburgh, Scotalnd) · London : G. Bell · leaf 195
S. These refer to Oil, Fresh Water, and Sea Water respectively. Steam Engine Calculator 2. This calculating slide rule has been designed with a view of facilitatingthe ready reckoning and checking of data for steam engines. The top scale refers to horse power, the second to piston speed, the… … Fig. 5.—Actual size of Disc, 135 inches diameter. SLIDE RULES 169 Dublin.) This rule consists of a disc 13 inches in diameter with a spirallogarithmic scale of 10 convolutions, and a scale of 1000 equal parts on theouter edge for logarithms of numbers on the spiral. A pair of hands aremounted and…
