NEWTONIAN CONSTANT OF GRAVITATION. 59 
upon the supposition that the balls are all spheres, and act as if they were concen- 
trated in their centres. The brass ball holders, as already explained, cause the forces 
to be actually more than they appear to be, on the assumption that the lead balls act 
as if they were concentrated in their centres, so that 1 + ‘0001866 is the factor by 
which the couple must be multiplied to correct for the brass bal] holders. The 
corresponding correction for the gold ball holder is only gggogo of the whole. One 
small correction, too small to matter, but which I have calculated with some labour, 
is the stability due to the vravitation of the table. This introduces a restraining 
couple upon the balls alone in Experiment & of gzq'999 of the whole. Finally, there 
263,000 
the gold ball for the wires and the lead ball for the fibres. Combining all these, 
the actual couple developed is found to be equal in Experiment 8 to 1942882 
inch? gramme 
apsaa US. 
is the correction already mentioned on p. 31 of on account of the attraction of 
second? 
Q 
3. The Dynamics of the Moving System. 
As before, I shall take my example from Experiment 8. 
Moment of inertia of counterweight No. 3o0rC. . = OlG5120 
dee . . . . . . . . . . . . . . . . 37245°9 Ae eo Age 
85547°17 
Te e-w ott maleelib eRe Wisin pte etoreadiada i aicrr/6 
T,” not taken. 
Moment of inertia added to beam when balls are placed in position, called B. 

( balls translated 5:302804 x ‘446652. . . . . . = 10578893 
| + hooks translated 0°1190 x °3792 . .. . . . = ‘0017093 
1 + balls rotated -4 x 5300252 x ‘126134? = ‘0337303 
(ck hooks rotated 012 x 0252. = ‘0000075 
Be ey eee = 10983364 
Chala ah es a CONGR TD 
Be Cea ee elo se 
BL,? — CT, 
OS a = SLITS, 
ae 
4? (B — C 
S = = 001196138. 
1 Ge Ee 
12 
