Velocities  of  Cannon  Balls , See.  67 
40* : 602 1:4:9::  39.2  : 88.  The  number  of  fhot  was 
eight,  and  the  circumftances  and  refults  as  exhibited  in 
the  following  table. 
u 
<u 
S 
*P 
Weight 
of  powder. 
Diam.  of 
the  ball. 
Height  of 
the 
charge. 
Struck  be- 
low the 
axis,  k . 
Weight  of 
the  ball. 
u. 
0 
13 
^ <U 
V a lues 
of  p . 
Values 
of  g . 
Chord 
of  the 
arc,  c. 
Veloc. 
per  fe- 
cond. 
z 
Oz. 
In. 
Inches. 
Inches. 
Oz. 
Pounds 
Pounds 
Inches. 
Inches. 
Feet. 
I 
2 
1.98 
92,5 
*7i 
i-°94 
328.0 
72.0 
13.0 
458 
2 
2 
1.98 
92-5 
i7i 
1.094 
329.1 
72.1 
17.8 
631 
3 
2 
1.98 
91.6 
l7i 
1.094 
33°*2 
72.2 
18.1 
650 
4 
2 
1.97 
3-i5 
91* 
lll 
1.078 
72.3 
17.6 
646 
5 
2 
1.97 
3*I5 
9°-5 
l7i 
OO 
q 
332-3 
72.3 
16.3 
604 
6 
2 
1.96 
3-*S 
92.4 
17 
1.063 
333-4 
72.4 
16.2 
598 
7 
4 
’*■97 
4-5 
92. 
Oi 
1.078 
334-4 
725 
24.0 
881 
8 
4 
1 .96 
45 
9°-5 
*7 
1.063 
335-5 
72.5 
25.0 
95° 
By  computing  the  velocities  from  our  theorem  invel- 
tigated  in  the  corollary,  they  come  out  as  they  are  here 
regiftered  in  the  laft  column  of  the  table,  and  they  are 
all  pretty  regular  excepting  the  firft  one,  which  is  about 
one-fourth  part  lefs  than  the  reft  with  the  fame  weight 
of  powder,  and  which  irregularity  mull  have  been 
caufed  by  fome  unperceived  accident.  The  values  oi  p 
and^  were  each  corrected  by  their  x'efpcctive  theorems; 
but  the  value  of  b was  kept  the  fame  (j\  feet)  through- 
ly 2 out, 
