Barton, lately at work at G.H.Q., for this vivid explanation of the Chart.] THE CHART .-- This Chart is a small scale reproduction of one used and corrected from day to day at British G.H.Q.in France.

It shows graphically the actual position at any given date of the British forces in FIGHTING STRENGTH, FRONT HELD, and HEAVY GUN POWER: when big operations are in progress it gives at a glance the number of CASUALTIES incurred and PRISONERS taken, perhaps the surest indication of the measure of success gained.

Owing to the size of the reproduction, the horizontal scale lines of the original Chart cannot be given.

To calculate a number at any particular date from the Chart as reproduced, it is only necessary to measure with a rule the height of the desired line at the given date.

Reference to the appropriate numerical scale at the side will then give the number.
1916, STRENGTH AND FRONT .-- Begin with the FRONT and FIGHTING STRENGTH lines.