( 577 ) 
Counterpoife at the other End, upon cutting the Strings 
the Veflei of Water was rais’d up, and the ^quilihrium. 
was not reftor’d tiil the Antimony came to the Bottom. 
By obferving that as the Cork (being freed from the 
Weight of the Antimony^ arofe, and that during the Fall 
of the Body, the Water funk to hh^ it appears that 
tills is, in efTed:, the fame Experiment as the former, 
and concludes no more. As to the real Caufe of the Va- 
riation of the Barometer, namely, the Accumulation of 
the Air by Winds over the Place where the Barometer 
rifes ; and part of the Air being blown away where the 
Mercury in the Barometer finks, fee Dodor Hallefe> 
Account of it in the Thil. Tranla6ihns. Numb. l 8 i, - 
TO s 
I N making the firfl Experiment before the R. Society, 
of a Piece of Lead liifpended by a Thread, whilft^ 
it was wholly cover’d with Water in the large Tube 
in which it hung (whofe Length was 4 Feet) it was 
obfervable, not only that the End oTthe Balance (to * 
which the Tube of Water with the Lead in it w^as 
fixed) did not rife when the Thread was cut, (to • 
Jet the Lead fall from the Top to the Bottom of the 
Tube) as it muft have done according to Mt. Leibnitzs 
Principle; but that the Paid End of the Balance began ' 
to defcend from the Time that the Lea'd began to fall. 
Therefore to be fure that it was not the Plummets 
rubbing againft the Sides of the Tube in its Fall, which 
caufed that fhtznomenony I hung to the Balance a 
long Giafs of three Inches diameter inftead of the Tube; 
and making the Experiment as before, it fucceeded in 
