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\ 
II. \An jiccount of an Experiment^ 
that aHual Souyid is not to be Tranfmitted 
through a Vacuiun. !By Mr, Fr. Hauksbee, 
F. S. 
T hat the Experiments already made, endea- 
vouring to produce Sound from a Bell m Vacuo, 
have been altogether inefFedual, is fufficiently mani- 
•u that the loft of it (hould be wholly at- 
tributed to the abfence of the Air, I think could not 
Without another Experiment be abfolutely concluded, 
fince the following Query, (which very well deferves 
an Anfwer^ might fairly be darted upon this Occa- 
fion. 
Whether the Sonorous Body in fuch a Mediu^f 
might not fo* fuffer, or undergo fuch a Change in 
its Parts, as to be render’d uncapablc of being put 
into fuch a Motion as is requifite for the Aidion or 
Produdion of Sound.- 
Now to fet the Matter of Fad in a true Light as 
near as -I could, I contriv’d the following Experi- 
ment. ^ ^ 
I took a ftrong Receiver, arm’d with a Braft-hoop 
at bottom, in which I included a Bell as laro’e as 
well it could contain. This Receiver I ferew’d dmn<r- 
ly down to a Braft-Plate, with a wet Leather between, 
and was full of common Air, which could no ways 
makes its efcape. Thus fecur’d, it was fet on the 
Pump, where it was cover’d with another large Re- 
ceiver. 
