424 
PROFESSOR F. BASHFORTH ON THE RESISTANCE OF THE 
Forms of Shot. 
Bounds 1-13 were fired on the 25th September 1866. 
14-31 „ „ „ 26th September 1866. 
32-43 „ „ „ 27th September 1866. 
A barge having anchored in the range, there was no opportunity of firing a single 
round during the whole of the following day, which interfered with the completeness 
of the experiment with the solid shot. As a uniform charge of 5 lbs. of powder was used 
for all the rounds fired, and as the solid were nearly double the weight of the hollow 
shot, the hollow shot had a much higher initial velocity than the solid. Hence the 
hollow shot had also a much higher initial angular velocity than the solid shot ; and 
it is probable that the initial angular velocity would be preserved nearly unimpaired 
throughout the observed range. This is manifested in the greater steadiness of the 
hollow ogivals. 
For the first round, the method of forming the Time-table, and the mode of using it 
in the calculation of the times of arrival of the shot at each successive screen, are indi- 
cated at full length. For further details I must refer the reader to the published de- 
scription of the chronograph. 
The screens were placed 150 feet apart, which distance is denoted by l. The first 
screen was 75 feet from the gun. t denotes the time occupied by the shot in passing 
from the first screen to a distance s feet, when t=as-\-bs ' 2 ; and 0, t 2 , t 3 , ... t n will denote 
the time when the shot passes the first, second, third, . . . nth screen, or the times corre- 
sponding to the particular values 0, l, 21, . . . n—l l of s. 
