578 
MR. W. C. D. WHETHAM ON THE ALLEGED SLIPPING 
Temperature. 
Time of swing. 
Logarithmic decrement. 
Unsilvered. 
13-5 
8-781 
•14224 
13-6 
8-783 
•14063 
13-6 
8-787 
•14115 
12-8 
8-801 
•14269 
12-y 
8-796 
•14328 
8-806 
•14276 
13-0 
•14204 
‘14278 
13T 
8798 
•14305 
‘14307 
•14289 
13-2 
8-794 
•14273 
•14192 
‘14125 
13-8 
8-732 
•14066 
14-0 
8-736 
•14052 
14-0 
8-740 
•14094 
14-2 
8-732 
•14106 
14-2 
8-750 
•14093 - 
•14090 1 
Silvered. 
12-6 
8-764 
•14338 
•14310 1 
120 
8-768 
•14274 
•14380 
12-9 
8-837 
•14.304 
131 
8-810 
•14270 
14-1 
8-829 
•14232 
13-9 
8-828 
•14125 
13-8 
•14191 
14-0 
8-806 
•14143 
14T 
8-808 
•14115 
•14121 j 
Unsilvered. 
14-0 
8-823 
•14167 i 
14-3 
8-830 
•14126 ' 
14-4 
•14101 
If we take the means of these observations we get ;— 
Temperature, l 
1 
Time. 
Logarithmic 
decrement. 
o i 
// 
13'60 
8-779 
•141801 
13-40 ! 
8-806 
•142335 
Unsilvered 
Silvered . 
From the series of observations with the unsilvererl flask we find that the alteration 
in the logarithmic decrement for a change in temperature of 1° C. is about ‘OOlfO. 
For 0°"26 the chairn'e will be ‘000416, and the logarithmic decrement of the imsilvered 
bulb corrected to a temperature of 13°‘40 is ‘142217. 
