( 1078 ) 
fdftned to a {Irong Thread, which going over the Pulley 
is (Iretched horizontally from G to the Nails F; to 
which it is faftned, fo as to be about a quarter of an 
Inch above the Board. 
B is one of the Bladders, hanging with the Neck gr hea- 
vieft part downwards, by means of a Loop of fine Thread 
as E H, which goes over the Horizontal Thread G E F. 
Now when with a pair of Sciflars the Thread of the Lead 
( which in all is but one Foot long) is cut juft at E, before 
the Loop of the Bladder, the Lead pulling away the String 
the Loop of the Bladder flips off the remaining Thread 
F E, and begins to fall exadly in the fame Inftant as the 
Lead : But if the Thread fhould be cut between E and 
F, as the Lead falls its Thread might give the Bladder 
an oblique Oiredion. 
He that obferves the time either with a Pendulum or 
Chronometer may take it very exa(ftly, by feeing the 
motion of the Sciflars as they cut the Thread. 
tJ. B. As the Diameters of thq Bladders were taken 
by wrapping a Thread twice round them, and fomething 
muft be allowed for the thicknefsof the Thread; i have 
here under fee down the Diameters of the Bladders, as 
eorreded by that Allowance. Fiz. A y.aS Inches; 
B 5,19 ; C 5,30 ; D 5” and E juft y Inches in Dia- 
meter. 
The Bladder E was rough, with feveral Wrinkles and in- 
equalities, which made it be longer in falling than it ought 
to have been, according to its Diameter and Weight. 
A Pail of Water thrown down met with fuch a Refi- 
ftance in falling ^7^ Foot thro’ the Air, that it was all 
turn’d into Drops like Rain. 
F I M r s. 
E rrata. Phll. Itrarf. N°. 357. Page 848. 1 , aa.lege ab ii' 32" 
N°. 359. p. 932. 1. 1 7- lege t rr o",i. p. 957. 1. 5, 6 . lege reftitui^ 
tur. Et Syftole Arteriaram cum Cordis DiaRole duratione convenit. 
p. looj, I. i(S. read, pooj of the f^ipy of the Opvion. 
