60 
ARTILLERY FIRE. 
When — p n _i is less than 12J yards, 
°r p n _ x less than (n — 1) yards 
it is not possible to make any correction of the fire for the n ih shot. 
When - p n -i > \ 5 yards and < V 5 yards, 
or P»-i > ¥ (^-*1) » " < ¥ {n — 1) yards 
the proper correction is for 
— 25 yards, 
and so on. 
The annexed table for use with service guns has been drawn out on 
the lines of this paper. 
To explain, we see in the third row, second column, > 374 < 1124, 
and at the head of the second column is the number 25. The meaning 
is that if the error of the 3 rd shot is anything between 374 and 1124 
yards, the correction for the 4 th shot is 25 yards. Similarly the table 
shows that the error of the 4 th shot beiug less than 50 yards, no cor¬ 
rection should be made. 
Practically it will be found that the gun settles down, after four or 
five shots, and that no further correction will be necessary. 
