37 
DETERMINATION OF DEFLECTION U. 
Excess Weight. 
Extremities 
of 
Oscillation. 
RestingPoint. 
Mean of prece- 
ding and 
succeeding 
resting points. 
Deflection 
due to 
Excess. 
Added 
109 
96 
]09 
102.5 
i 
Removed 
93 
40 
92 
66.25 
102.25 
36 
Added 
| 
152 
53 
150 
102 
66.75 
35.25 
Removed 
80 
55 
79 
67.25 
102.5 
35.25 
Added 
147 
60 
145 
103 
Mean value of n — 35.83. 
TIME OF VIBRATION AT END. 
POINTER APPARENTLY MOVING PROM , POINTER APPARENTLY MOVING FROM 
LEFT TO RIGHT. | RIGHT TO LEFT. 
No. of 
Vibration. 
Observed time 
of passing of 
pointer through 
resting point. 
No. of 
j Vibration. 
Observed 
time of 
passage of 
pointer 
through 
resting p’t. 
Time of 10 
Vibrations. 
i 
No. 'of 
Vibration. 
Obstrved time 
of passing of 
pointer through 
resting point. 
t/5 Observed 
§ 1 time of 
.43 passage of 
o g pointer 
^ £ through 
resting p’t. 
Time of 10 
Vibrations. 
1 
0 
llli 26' 19" 
10 
28' 27" 
I 
128 1 
1 
26' 32-5" 
11 28' 39" 
126.5 
2 
26' 44"- 5 
12 
28' 53" 
128-5 
3 
26' 58" 
13 29' 5" 
127 
4 
27' 10" 
14 
29' 18" 
128 
5 
27' 23-5" 
15 1 29' 30"-5 
127 
6 
27' 35"-5 
16 
29' 44" 
128-5 
7 
27' 49" 
17 29' 56"-5 
127-5 
Mean value of 10 vibrations.. 
128-25 
■ 
Mean value of 10 vibrations.. 
127 
Mean of Means=:127 - 625. 
^=12-7625. 
— — — I 
Remembering that one tenth of a division of the scale is 
an angle of *0003996 in circular measure formula (4), ex- 
pressed in milligrammes, becomes 
11 i/ 2 
p = -p 0-3996^-(Mc/I 2 + 2 Pa 2 ) 
