450 
MR. B. H. GRIFFITHS ON THE VALUE OF 
Experiments 60 and 61 :— 
P 
Q 
Experiments 62 to 65 
o- = -000358 
•000478 
•0131. p = -2)7 millim. 
cr = -000360 
p = -000483 
Q = -0132. p = -37 millim. 
> J 8 and 9. 
> J 10 to 12. 
Experiments 66 to 80.—The cause of irregularity had not yet been ascertained, and 
therefore not removed. During this series we made several changes in the connections 
between the stirring rod and the revolving shaft above it, and also in the pressure 
around the calorimeter. 
W = 277‘971 throughout this series. 
Experiments 66 to 71 :— 
o- = -000276 ■] 
p = -000361 I J 13 and 14. 
Q=-0131, p — ’37 millim.^ 
Experiments 72 and 73.—The position of the revolving shaft and counter was 
slightly altered, and the whole of this portion of the apparatus re acljlisted. 
a-=-000272 
p = -000374 
Q = -0136. p = -38 millim. ? * 
>- J 15 and 16. 
Experiments 74 to 78.—The double Hooke’s joint was now removed and replaced 
by a single one in the hope of diminishing the vibration of the stirring rod, the 
pressure was at the same time somewhat reduced. 
The value of cr showed considerable alteration. 
cr = -000267 
p = -000363 W 17 and 18. 
Q = -0132. p = -37 millim. _ 
* There is probably some error hei’e. We have only a single note of the pressure during this day 
(August 28), and we have no means of checking it since Experiment 74 was not performed until 
August 30. Now (as we find recorded in our notes), we gave twenty-three strokes to the mercury 
pumps on August 29, the resulting pressure on August 30 being '37 millim.; it appears almost 
certain, therefore, that the pressure on August 28 must have exceeded '38 millim. 
