Lee-Metford {Mark II.} 42 in. of 1 in. deal boards 60 in. of sand Lee-Enfield {bullet } 1 in. apart containing 15 per cent. of moisture The penetration of bullets of .314 calibre differs little from that possessed by the Lee-Metford or Lee-Enfield, of which the muzzle velocities are very little lower, with Mark II. bullet. The Belgian Mauser perforates 55 inches of fir-wood at 12 metres distance. With regard to the penetration of bullets of smaller calibre that of the Roumanian Mannlicher (.256) may be taken as typical. When fired into a sand butt at 25 yards the bullet enters 9 inches and then breaks up. The comparative size of the different cartridges is shown in fig. 14. The general remarks already made as to the effect of weight, calibre, and velocity sufficiently explain the importance of the particulars given in this table, but it will be noted that the Lee-Metford rifle is inferior to both the Krag-Joergensen and Mauser rifles in the initial velocity transmitted to its bullet. The tendency to equalisation, in this particular, when the remaining velocity is considered, has been mentioned; but it may be of interest if I quote from Nimier and Laval[7] the scale on which the decrease in velocity takes place in the case of the three weapons. METRES PER SECOND +---------------------+-------------+--------+----------------+ | | Lee-Metford | Mauser | Krag-Joergensen | +---------------------+-------------+--------+----------------+ | | | | | | Initial velocity | 630 | 718 | 720 | | Remaining velocity: | | | | | At 100 metres | 574 | 699 | 718 | | At 1,000 metres | 249 | 264 | 269 | | At 2,000 metres | 159 | 165 | 165.9 | | | | | | +---------------------+-------------+--------+----------------+ Giving full importance to the effects of velocity as a factor in the severity of the injuries produced, when the large proportion of wounds received at distances above 1,000 yards is borne in mind, we see how rapidly the superiority of the smaller projectiles is lost. This loss, even in the early stages, is probably more than made up for in the case of the Lee-Metford, when the superiority in weight, calibre, and bluntness of extremity as contributing to striking force is taken into consideration. The striking force (kinetic energy) of a bullet is indicated by the following formula: F = 1/2 mv.^{2}; that is to say, the striking force is equal to half the weight of the bullet multiplied by the square of the velocity.