( *094 ) 
the Mercury will run out, till it comes to fomc Icller 
height as B C, at which it will again flop, the height 
B C being nearly in a recipr -cal proportion to tire Dia- 
meter of the (mall end of the Tube. 
The Seventh Experiment in Phil. Tranf. N®. 35J i^ 
the Reverfe of this. 
Exp. VI. Fig. lO. Is the fame in fubflance with the 
former, but made with a large Glafs Funnel A B, 
inftead of a Tube. 
The Reverfe of this in Water is the thirteenth Expe- 
riment in the fame Eranfadfion. 
In all thefe Experiments it is eafily feen, that the Ef- 
fect is owing to the difference between the two Artra- 
dions, by which Mercury tends to Glafs and to its 
own body ; they being always oppofed to one another, 
fo that a particular Explication is no way neceflary. 
But perha^ it may fave fome little trouble to the Rea- 
der, to remove the following Objediion, which wHl 
readily occur to him. 
In the Experiments brought to demonflrate the 
fourth Propofition, the Globule of Mercury adheres to 
the Glafs in a plane Surface, w’hich cannot be done 
without encreafing the Surface of the Globule, and con- 
iequently removing fome of its Particles from the con- 
cad of one another. If therefore they tend more flrong- 
ly to one another than to the Glafs, |yhy do they nor 
recede from the Glafs, and alTunie a figure perfedly 
Spherical, that they may all have the greateft poffible 
contadt with each other I 
To this we may anfwer, that the Power, by w hich 
Mercury is atttaded either by Glafs, or by other Mer- 
cury, is proportional to the attrading Surface; and 
therefore, though, cotter is parihus, the tendency of Mer- 
cury to Glafs is not fo ftrong as its tendency to other 
Mercury, yet in this cafe a much greater number of 
Met-. 
