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In making thefe experiments, he found, that a man 
could, without great detriment, bear a much greater 
{hock than he imagined : for he inadvertently re- 
ceived the ftroke of two of thefe jars through his 
arms and body, when they were very near fully 
charged. It feemed to him an univerfal blow through- 
out the body from head to foot, and was followed 
by a violent quick trembling in the trunk, which 
went gradually oft' in a few feconds. It was fome 
minutes before he could recoiled! his thoughts, lb as 
to know what was the matter ; for he did not fee the 
flafli, tho’ his eye was on the fpot of the prime con- 
dudlor, from whence it ftruck the back of his hand ; 
nor did he hear the crack, tho' the byftanders laid 
it was a loud one 5 nor did he particularly feel the 
ftroke on his hand, tho’ he afterwards found it had 
raifed a fwelling there of the bignefs of half a fwan- 
fhot, or piftol-bullet. His arms and the back of his 
neck felt fomewhat numbed the remainder of the 
evening, and his breaft was fore for a week after, 
as if it had been bruifed. From this experiment 
may be feen the danger, even under the greateft: cau- 
tion, to the operator, when making thefe experi- 
ments with large jars ; for it is not to be doubted, 
but that feveral of thefe fully charged would as cer- 
tainly, by increaftng them, in proportion to the lize,. 
kill a man, as they before did the turkey. 
Upon the whole, Mr. Franklin appears in the 
work before us to be a very able and ingenious man 
that he has a head to conceive, and a hand to carry 
into execution, whatever he thinks may conduce to 
enlighten the fubjedl-matter, of which he is treating : 
and aitho’ there are in this work fome few opinions, 
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