Influence of the Dielectric 245 



Hence it should seem that the plate D contained about r-6 inc. el. less than 

 the plates E or G, which is nearly conformable to p. 26, 1772 [Art. 489]. 



The thick rosin plate seems to contain just the same as doub. pi. B, and 

 the 2 n " rosin plate to contain 2-49 inc. el. less than D. The thick white seemed 

 to contain -79 inc. el. less than D. 



502] Q and P compared with M and K of Nairne, also green cylinder 4 and 

 white cylinder compared with plates of Nairne by means of sliding trial plates. 



Mon. Oct. 18*. Th. 64$. N. 17 J. C. - 15. 

 [13 observations, Art. 660]. 



[Result.] Therefore K seems to contain 5 inc. el. less than M, conformable 

 to 1772, p. 26 [Art. 489]. 



O contains 16 inc. less, and P 16 less. 



The comp. power of white cyl. = 537-5, and [it] appears to contain 756 inc. el. 

 Therefore inc. el. by comp. power = 1-41. 



The comp. power of green cyl. is 318-2, and [it] appears to contain 540 x f 

 inc. el., therefore inc. el. by comp. power = i-62f. 



503] I st and 2 nd green and white cylinders and white jar compared with H of 

 Nairne in usual manner. 



[12 observations.] 



[Result.] Hence it should seem that the white cyl. contained as much el. 

 as H; the 2 nd green contained 45 inc. el. more than H; the I st green uncertain, 

 and the white jar seemed to contain 74 inc. el. more. 



504] Trials of the same cylinders and jar in same manner except that in trying 

 the white jar and I st green cylinder the plate M of Nairne was placed on the neg. 

 side as an additional trial plate. 



Sat. Dec. 5 [1772]. Th. 56. N. 20. 

 [13 observations. Art. 660.] 



[Result.] Hence i flt green cylinder should cont. 135 inc. el. more than H 

 2 nd 56 



white cyl. 7 



white jar 88 



* [As the records of the actual observations in the following articles are of pre- 

 cisely the same nature as those already given, they will be omitted, and as the 

 author has summed up the results for each day, these statements only will be given, 

 except in cases of more than ordinary importance. According to the day of the 

 week and month the dates for these experiments should belong to 1773, but as the 

 experiments seem continuous with those of dates before and after which are certainly 

 in 1772, I think Cavendish made a mistake in the day of the month which he did 

 not find out till 4"" November.] 



f [These measures of specific inductive capacity must be multiplied by 5-1. 

 See note to Art. 462.] 



