On the power of machines, etc : ... with the method of computing their force : description of a simple instrument for measuring the velocity of air out of bellows, whatever be the pressure, also of a gauge for measuring with accuracy the rarefaction in the cylinder of a steam engine, demonstration of a parallel motion, observations on wheel carriages, on lathes, on the lever, etc., construction of a crank ..., experiments on the strength of oak, fir, and cast iron : with many observations respecting the form and dimension of beams for steam engines, etc. / by John Banks.