its 



DR. E. H. GRIFFITHS AND MR. EZER GRIFFITHS ON THE 



TABLK II " Total Heat " Method. 

 Copper at C. Thermometers AB, CD. 



February 24 

 24 

 25 

 25 

 25 

 ,. 26 

 28 



March 10 

 10 

 10 



11 



12 



II. 



5 



6 

 1 



- 

 9 

 4 

 7 

 8 

 9 

 7 

 4 

 i 



III. 



1374-8 

 95-5 



3743-5 

 557-4 

 446-8 



2125-9 

 717-8 

 557-6 

 446-9 

 718-3 



2126-0 



2123-8 



IV. 



109 

 85 



231 

 60 

 52 



150-5 

 70-5 

 59-9 

 52-2 

 70-3 



150-9 



150-2 



V. 



0-0027 

 0-0018 

 0-0071 

 0-0009 

 0-0006 

 0-0042 

 0-0012 

 0-0009 

 0-0006 

 0-0012 

 0-0042 

 0-0042 



VI. 



0-0355 

 0-0510 

 0-0141 

 0-0843 

 0-1036 

 0-0239 

 0-0662 

 0-0841 

 0-1039 

 0-0658 

 0-0241 

 0-0234 



VII. 



1-3356 

 1-3519 

 3095 

 3863 

 4059 

 3224 



1-3678 



3861 

 4062 

 3674 

 3227 



1-3219 



VIII. 



0-09070 

 0-09062 

 0-09068 

 0-09070 

 0-09073 

 0-09066 

 0-09064 

 0-09073 

 0-09073 

 0-09072 

 0-09070 

 0-09060 



IX. 



+ 0-02 



-0-06 







+ 0-02 

 + 0-05 

 -0-02 

 -0-04 

 + 0-05 

 + 0-05 

 + 0-04 

 + 0-02 

 -0-08 



Mean . . . 



0-09068 +0-00016* 



rhere 



M = 3395-80, 

 ms = 6-489, 



R = 20-599, 



E= 1-01843(17-0.), 



Column I. = date of experiment, 



II. = n (number of standard cells), 



HI. = / (seconds), 



IV. = time over first interval, 



., V. = radiation correction on range, 



VI. = " rise above " in degrees Pt, 



,, VII. = true range, 



VIII. = specific heat, 



IX. = percentage difference from mean. 



* The value 0-09068 for S is obtained on the assumption that coincides with bridge- wire reading; 

 if, however, the balancing point was at + 1 bridge wire reading, and the range from - 9 to +8 bridge 

 wire, then, on account of radiation gain, the above value of S requires a correction of + 00005. 



At the time these experiments were made we did not realise the importance of this correction and, 

 conaequently, did not determine the balancing point on the bridge with sufficient care (see p. 151). 



In our rough notes made at the time we have values ranging from +0- 1 to +0'4 bridge wire. 



Applying the "intersection method" (see Section X. (2)) to the above experiments, omitting the first 

 two or three transits in each case, we find from the calculated value of N that the balancing point should 

 be at +0-33 bridge wire. If we assume this value, the correction on S is +0-00016. 



Hence 



8 = 0-09084. 



