512 Mr. Babbage on electrical 
Oscillations of 
Diff. 
l Diff. 
Mean point. 
needle. 
O 
0 
O 
L ... 347.8 
I R-.. 343-6 
4.2 
2.1 
345-7 
L ... 347-0 
R ... 343-5 
3.5 
‘•75 
345- 2 5 
The lamp was now lighted. 
L . . . 348 
R... 344 
L ... 339.5 
R . . . 346 
L ... 331.2 
R 337 
L ... 330 
R ... 339 
L... 334 
R... 337 
L . .. 330 
R .. • 34 2 "5 
L ... 332.5 
R ... 356.5 
L ... 341.4 
R ... 396 
4 
2 
346 
6.5 
3.25 
342-75 
5.8 
2.9 
334 * 
9 
4-5 
334-5 
3 
*•5 
335-5 
12.5 
6.25 
336.25 
24.0 
12.0 
344-5 
54-6 
27.3 
368.7 
At one part of this experiment the needle became sta- 
tionary, as if it had arrived at the end of its arc ; it then went 
on again in the same direction as before. This stationary 
point should perhaps be considered as the extreme right of 
one vibration, and the extreme left of the next: I have 
noticed it more than once in these inquiries. The column of 
the mean point of the needle has, in this experiment, marked 
the same retrograde motion on the first application of heat, 
and the same motion in advance, when that heat has con- 
tinued, as in former ones. 
Experiment 14. 
The same apparatus ; the copper disc revolving at -§ inch 
