THE ROYAL ARTILLERY INSTITUTION. 
207 
The velocity is greatest when the point of ignition is at about -f^ths the 
length of the cartridge from the rear. 
(2) The velocity of the projectile is least when the point of ignition is at 
the rear of the cartridge. 
(3) No particular disadvantage was observed consequent on igniting the 
cartridge near the centre. 
(4) The velocity of a spherical projectile is increased by the use of rifle 
L.GL, which besides being a larger-grained powder than L.G., is of slightly 
less specific gravity. 
(5) The results with a very large-grained powder or pellet powder are 
the same, only modified, that is, the differences between the velocities given 
by varying the point of ignition of the charge are not so marked as with 
smaller-grained powder. 
These experiments have proved that more work can be obtained from a 
given charge of powder by igniting the cartridge at a point -^ths of its 
length from the rear, than by igniting it in any other position. The effect, 
however, which this will have on the initial strain in the gun and, 
consequently, on its endurance, is a matter for separate consideration. 
