iooo Mr. Wilson’s Experiments 
judgement, very unlike what happens in nature ; and 
therefore I contented myfelf with pointing out the fe- 
veral circumftances in which they differed ; and in ob- 
ferving that, according to Mr. henly’s account, the point 
did not protect the rounded end from being ftruck, 
which it ought to have done, if Dr. franklin’s philo- 
fophy was well-founded. 
Since that time an occafion has offered which made it 
neceffary to try this particular experiment. The occafion 
alluded to arofe from a late inveftigation of Mr. nairne’s 
experiments by Dr. musgrave, who was delirous of 
having that experiment repeated; becaufe (as it flood in 
Mr. henly’s account) it feemed to contradict a confidera- 
ble part of the doctor’s reafoning. 
Not being furnifhed with an apparatus to make the 
experiment, I requefted the favour of Mr. cavallo to 
affift me with his; and though it was not fo compleat for 
the purpofe as could be wifhed, yet it anfwered fufii- 
ciently well to fhew, that an attention to the circum- 
flance of a perfect communication in this experiment 
was very material to difcover the truth; and that the 
want of it had, probably, occafioned the ball being ftruck 
in preference to the point, as related by Mr. henly : for 
upon employing a wire infteadof the chains, the point was 
ftruck at more than three times the diftance of the ball. 
Seeing 
