246 CAUSES OF DRIFT. 
Instrument for projecting Shot. 
When the shot is projected without rotation, it turns over in flight, 
thus showing the impracticability of obtaining favourable results by 
firing elongated projectiles from pieces which do not give rotatory 
motion. 
The shot 4 can be made to rotate with different degrees of velocity 
by pulling a thin silken cord wound round the hind centre p. Ifa slow 
rotatory motion be imparted to the shot, and it is then projected, it will 
proceed point first with a wabling motion; but if the projectile be 
given a rapid rotation, the axis will be stable during flight, and remain 
parallel to its primary direction. 
Pointed and flat-headed shot of paper were also employed, and being 
so much lighter than those of wood the effects of the air’s resistance 
upon them were more evident. 
