CONTINUOUS CALCULATING MACHINES. 
401 
mission of power is small and easily calculated, and, moreover, may be reduced by 
increasing the value of N, and therefore reducing both p and P. Practical defects 
from any possible yielding of the sphere from the effect of the last of these three 
quantities, viz., P, which cannot well be made a matter of calculation, are thus reduced 
to any required extent. If the mechanism should prove to be durable, there is, apart 
from the purely mathematical objects which necessitate accurate working, and which 
led to its discovery, no apparent limit to its practical applications. It could replace 
combinations of wheel-work for such purposes as are required in cotton-spinning or 
Figs. 32, 33, and 34. 
textile machinery, small lathes, electric, and other machines where rapid change of 
velocity ratio is required, and absolute accuracy is not essential. 
The thanks of the author are due to his friends Mr. Edward Buck, M.A., and 
Mi. C. D. Selman, of whose valuable opinions he has been glad to avail himself in 
seveial points in the paper. Also to his brother, Mr. Edward Shaw and to Mr. 
Charles Bullock, B.A., for the great skill they have shown in constructing the 
second foim of Integrator and the “power” mechanism, and for the assistance of the 
former in the preparation of the drawings. 
