To calculate percentages of compositions.
Set weight (or volume) of sample on C, to weight (or volume) of
substance considered, on D; then under index of C read required
percentage on D.
EX.—A sample of coal weighing 1·25 grms. contains 0·04425 grm. of ash.
Find the percentage of ash.
Set 1·25 on C to 0·04425 on D, and under index on C read 3·54, the
required percentage of ash on D.
Given the steam pressure P and the diameter _d_ in millimetres, of the
throat of an injector, to find the weight W, of water delivered in lb.
per hour from W = (_d_^2√̅P)/(0·505).
Set 0·505 on C to P on A; bring cursor to _d_ on C and index of C to
cursor. Then under _d_ on C read delivery of water on D.
To find the pressure of wind per square foot, due to a given velocity in
miles per hour.
Set 1 on B to 2 on A, and over the velocity in miles per hour on D read
pressure in lb. per square foot on B.
To find the kinetic energy of a moving body.
Set 64·4 on B to velocity in feet per second on D, and over weight of
body in lb. on B read kinetic energy or accumulated work in foot-lb. on
A.