IV. An Account of un Experwie7it touching the 
Propagation of Sound through Water. By 
" Mr. Fr. Hauksbec, F. R. S. v 
A n Experiment that I made fome time (Ince, 
fhewit>g that adual Sound could not be 
tranlmirted through a Vacuum, gave me an Incli- 
nation to try what would be the efFed, to furround 
the Receiver that contain’d the founding Body, with 
fo dcnfe a Medium as Water. Accordingly, as in 
the former Experiment, the Receiver which con- 
tain’d the Bell was ferew’d down to a Brafs- 
plate, ^ with a Leather between 5 This Receiver 
with its Bell , was fufpended in a large Glafs- 
VelTel, by Four Twine-threads to the top, and as 
many to the bottom .• whereby it remain’d in 
the middle between both. Concluding likewife. 
that thefe Threads would fo abforbe the Water 
when it fhould come to be put in, that there 
could be no Apprehenfion^ that any Sound fhou’d 
be convey’d by them from the founding Body , 
any more than if they were intirely Water. Thus 
provided , the Clapper was made ~to ftrike the 
Be-ll, whofe Sound was fomething lefs by the In- 
terpofition of the Glafs, than it would be, had 
it been made in the open Air 5 however it was 
very audible, and might be heard at a confidera- 
ble diflance : It appear’d to the Ear to be very 
harOi, in refped to the Tone it afforded us- But 
now, when the Water came to be pour’d in, and the 
inward Receiver furrounded by it, at leaft* an Inch 
and an half trom the neareft part of the outward 
Glafs, the Clapper again was made to give the 
Sound j which it did, feemingly, very little lefs, 
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