THE ROYAL ARTILLERY INSTITUTION* 
41 
All the foregoing cases have reference to time fuzes. If percussion fuzes 
are used, then we must fire directly at the foot of the target, and should the 
ground he hard and. smooth, and the fuze arrangements perfect, we shall 
then see some such result as is sketched in Figs. 19, 20, namely, the 
bottom of the target obscured by smoke, and the earth, stones, or mud 
knocked up by the splinters, visible beyond the targets. 
We have hitherto taken the simplest view of the case. Let us suppose 
the wind blowing either from us, or towards us, as in Fig. 21, the 
