Shock through loops of chain 307 



3B + C + 2A = (9-2) commun. to i row, 2 ce passed through 2 loops, once 

 missed, once did not pass through 3, never through 5. 



R communicated to 7 rows = 20-6 was tried 3 times without ever passing 

 through 3 rows. 



Wed. May 31 [1775]. 



606] i jar was elect, and commun. to i row of battery, and shock taken 

 without torpedo. There seemed a little difference in the strength of the shock 

 according to which row it was communicated to, but hardly more than was 

 observed at different times from the same row. 



Result of exp. May 30. 



607] By mean, quant, el. req. to give same shock with 7 rows is to that 

 with i :: 18-3 : 11-5 :: 1-6 : i*. 



Charge req. to force through j b with 7 rows is to that with I in rat. 



(6-6 to i Sr j6-2 to i KTI mn ^ j6~4 to i 



to i ' 



^ . w^-w 



(6-6 to i (6-2 to i (6-4 



between < & < , by means as { 



\5-7toi 1 3-7 to i' (4-8 



Tu. June 6 [1775]. 



608] The 2 nd leather Torp. was tried in sandf wetted with salt water. The 

 Torp. lay flat on sand and was covered by it all but pos. elect, parts & middle 

 of back. With 3 rows charged to ij, felt a shock whether I laid bare hands on 

 torp. & on sand 16 inc. dist. from nearest part of D, or whether I touched torp. 

 with metals. In latter case shock seemed much the same as shock 10 inch plate 



crown glass { received through Lane's el. at - - inc. 



If I laid pieces of sole leather which had been soaked in salt water for a 

 week and then pressed between paper with hundred weight for J day to drain 

 out moisture on torp. and on sand, and received shock with metal that way, 



shock was about equal to that of 10 inc. plate with Lane at - 



1600 



The torp. taken out of sand and tried with metals in usual way gave shock 

 about equal to D plate, Lane at i8J. 



Being tried in same manner with i row, shock was weaker than in sand 

 through leathers, & with 2 rows stronger than without leathers. 



The spe. gra. bottle with water which came from sand weighed 8.4.11. 

 Th. at 69, so that the water with which it was moistened appears to be of 

 right strength. 



609] Bits of beech, wainscot & deal|| about f inch square were soaked in 

 salt water for 3 or 4 days, then taken out and wiped and exposed to the air 

 in dry room for about 6 hours. 



* [Arts. 406, 573, 610, and Note 31.] t [Art. 422.] 



J [Arts. 411, 430.] [Art. 423.] || [Art. 588.] 



20 2 



