Memorandum on the Adjustment of Dynamometers. 685 
Figs. 1-3, — Diagrams constructed for oblaining Coefficients of fie 
new Plough Dynanovieter. 
indications of the counter, as m, n, and (j ; then, if the machine 
is perfect, the line joining the ends of the ordinates woukl be a 
straight line, and if produced would pass through o, the zero- 
point of the base-line. Assume that it does so, then taking any 
one of the trials, say the third, the work done in foot-pounds 
will be 
I lbs. X 300 ft. = C X q, 
i 
