7 2 Mr.  hutton  on  the  initial 
degree  as  in  the  laft  one.  It  was  alfo  nearly  the  fame  in 
the  fucceeding  days,  as  may  be  perceived  by  infpedting 
the  fourth  column  of  each  courfe,  which,  denoting  the 
height  of  the  charge,  fhews  the  degree  of  compaftnefs 
with  which  the  powder  was  lodged  in  the  piece.  The 
dimenfions,  as  taken  this  day,  were  thus : 
p - 324  pounds,  the  weight  of  the  pendulum. 
g — 7 1 .4  inches,  the  diftance  of  the  center  of  gravity. 
b ~ 88  inches  = 7 j feet,  the  diftance  of  the  center  of 
ofcillation. 
r — io2j  inches,  the  whole  length  to  the  tape. 
Number. 
Weight  of 
powder. 
Diam.  of 
the  ball. 
Height  of 
the 
charge. 
Struck  be- 
low the 
axis,  k . 
Weight  of 
the  ball. 
Weight  of 
the  ba!l,£. 
Values 
of  p . 
Values 
of  g. 
Chord 
of  the 
arc,  c. 
is. 
so 
d « 
-2  8 
<D  .<L> 
Oz. 
Inches. 
Inches. 
Inches. 
Oz. 
Pounds 
Pounds 
Inches. 
Inches. 
Feet 
1 
2 
2.080 
2.85 
94 
19! 
1.219 
324.0 
71.4 
23.O 
700 
2 
2 
2.036 
2.85 
94 
1 8i 
1.141 
325-2 
7i  5 
24-5 
799 
3 
2 
2.045 
2.85 
93i 
i8| 
1.156 
326.4 
71.6 
22.0 
7i5 
4 
4 
2.062 
4. 
92? 
l9 
1. 188 
327-5 
71.7 
27*3 
880 
5 
4 
2 036 
4* 
93! 
>8* 
1.141 
328.7 
71-7 
35-o 
1163 
6 
4 
2.045 
4* 
93i 
18I 
1.156 
329-9 
71.8 
33-° 
1087 
Here  the  common  mean  weight  of  the  ball  is  i8j 
ounces,  the  mean  velocity  with  two  ounces  of  powder  is 
738,  and  that  with  four  ounces  of  powder  is  1043.  feet 
per  fecond.  The  ratio  of  thefe  two  velocities  is  that  of 
1 to 
