210 METHOD OF INCREASING AJ* ELECTRICAL CHARGE. 



to show the phenomena of voluntary explosions without 

 breaking) twelve inches high, and the coating nine inches, 

 containing in the whole I71 square inches. It was applied 

 to the conductor of a plate electrical machine, and six turns 

 of the plate caused a voluntary explosion. The state of the 

 atmosphere not being very dry, it lequired eight and twelve 

 turns, to produce a second and third explosion. A fourth 

 could not be produced; but, when cleaned and dried, as 

 before, six turns caused a voluntary discharge. 



Exp. 2. Exp. 2. A slip of paper one inch broad was taken of 



sufficient length to tit the outside of the jar, when the two 

 ends were pasted together. This was slipped on the outside 

 to about one inch from the coating, the uncoated part being 

 rubbed clean and dry, and applied to the machine, eleven 

 turns of the plate produced a voluntary discl3arge to the 

 outside coating. 



E«p. 3. JExp. 3. The paper ring was then slipped down to touch 



the coating, and then applied to the conductor, no volun- 

 tary discharge could be produced, and when discharged in 

 ♦ the common way, its power did not seem to be increased. 



Exp. 4. ' JExp. 4. The common discharging electrometer (which 



is always fixed to the basement of my machine) was used, 

 to try to what distance the discharge could be made to 

 pass from the knob of the conductor to the ball of the elec- 

 trometer, which was found to be one inch and |. 



Exp. 5. Exp. 5. A piece of iron wire xj~ P'lrt of an inch in dia- 



meter, and one inch in length, was hung to the electrome- 

 ter, through which a second discharge was made to pass, 

 and the colour of the wire was changed to a blue. 



i^Kj). 6. Exp. 6. The paper ring was then taken off, and I breath- 



ed into the jar twice; the discharge was then produced at 

 the distance of two inches, and the wire was fused into 

 balls. 



¥.x[).7. Exp. 7. The jar was then rubbed clean and dry, and a 



piece of tlie same sort of wire, of the same length, was 

 liung to the electrometer in the same manner as before, and 

 it appeared, that the greatest charge it could take had not 

 the least effect upon the wire. Thus it appears, that a paper 

 ring so applied does not increase the charging capacity of 

 jars in the same degree a=5 breathing. 



Exp. 



