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Published online by Cambridge University Press: 17 January 2013
Sir,
I Have examined my memorandums, concerning the observations I made on the condensed air in the air vault of the Devon Iron Works, near Alloa; and, according to your request, I now transmit you an account of them; and also of an experiment I made, when a partner and manager of these works, in order to increase the produce of blast furnaces.
page 40 note * If Q be the quantity of a fluid, issuing in a given time through an aperture of the diameter. D, V its velocity, and P the power by which it is forced through the aperture: then the area of that aperture being as D2, the quantity of the fluid issuing in the given time will be as VD2, or VD2 = Q.