2 1 6 "Journal of Experiments, \ 77 1 



Same wire touched by middle of touching wire. 

 18 doubtful. 



20 did. 



9 did not. 



7 doubtful. 



5 did. 



449] From these experiments the quantity of electricity in 



long wire touched at end -j should / 96 



middle I seem | 94 



short wires 36 dist. (to | 96 



do. 18 - J be as I 87 



450] Experiments to determine whether the quant, el. in the large circle 

 was the same whether it was supported on waxed glass* or on silk strings, the 

 trial plates, which were of wood covered with tinfoil, being supported on waxed 

 glass, the large trial plate drawn out to n inches being expressed by L n, the 

 small ditto by S n. 



Large circle supported on silk strings. 

 L 5 sep. pos. very sensibly if I staid some time before letting down the wires, 



but scarce sensibly if I did not. 



L 4 seemed to separate, but rather doubtful if I staid, but not if I did not. 

 8 5 sep. neg. if I did not stay, but not if I did. 

 L 5 tried again, sep. very little whether I staid or not. 



The circle supported on waxed glass. 

 L - 5 sep. very little whether I staid or not. 

 S - 5 sep. very little whether I staid or not. 



From these experiments there seems no reason to think that there is any 

 sensible difference in the quantity of electricity whether the circle is supported 

 on silk or on waxed glass. I believe the air was moderately but not very dry when 

 these experiments were tried. The next experiment was made the same night. 



451] Experiment to determine whether quantity of electricity in coated 

 glass bears the same proportion to that in a non-electric body whether electrifi- 

 cation is strong or weakf. 



Two pair of corks were made; each separated with rather a less degree of 

 electrification than those used in former experiments. Some lead was then added 

 to those of one pair, so as to double their weight and consequently to make 

 them require 2 ce the force to make them separate. 



The plate of glass used was the double plate called A in the following ex- 

 periments, but with coating 1-78 inches diameter. 



Tried with light corks. 

 L - 3 sep. a little pos. 

 S 4 as much neg. 



* [See Art. 255.] t [See Art. 355.] 



