FIGURE OF MERIT. 
193 
(2.) To obtain the numerator. 
This is got from consideration of the hits actually obtained by 
the company, shewn on the following table. 
Gun. 
Range. 
Remarks. 
Striking Energy. 
9-2" 
2925 
Ricochet £ value 
3355*9 foot tons. 
6" 
2650 
1180-9 
9-2" 
2625 
Ricochet £ value 
3543-49 
6 " 
2550 
1217-3 
6" 
2500 
1235-8 
6" 
2600 
1235-8 
9-2" 
2525 
7217-22 
6" 
2650 
1217-3 
Total . 20203-71 
This gives the numerator, and the figure of merit is:— 
20203-71 _ 0 . 291 
69216-59 - u 
In computing the possible striking energies the ranges are taken to 
the nearest twenty-five yards, and in all cases the value of a ricochet 
hit is taken as half that of a direct hit. 
8. A table of striking energies (see Table II.) has been pre¬ 
pared for every gun in the command, from which service practice is 
carried out, for every twenty-five yards from 1500 to 3000 yards. 
At the head of the table is given logarithm (W~2g. X 2240) for each 
nature of gun. 
By the aid of this logarithm any other striking energy not in the 
table may be at once found by only two references to the logarithm 
tables and thus the figure of merit of any ordinary series of service 
practice may be worked out in less than five minutes. 
Note —For Tables I. and II. see next page. 
