C ) 
(lains a heavy Body is prefs’d by ic. A Table, for 
Example, which fuftains a Pound Weight of Iron, is 
prefled by ic, and is To only becaufe it fuftains the 
whole Adion and Effed of the Caufe of Gravity, 
(whatever it be) to pufli that Lump of Iron lower. 
If the Table (hou’d yield to the Adion of that Caufe 
of the Weight (or Gravity) it would not be prefs’d, 
and therefore would carry nothing. After the fame 
manner the Bottom of a Veflcl, which contains a 
Liquid, oppofes it fclf to all the Adion of the Caufe of 
Gravity againfl the faid Liquid : IfaflrangeBody fwims 
in it, the bottom oppofes it felf alfo to the faid Adion 
againfl that Body, which, being in yEquilihrio with the 
Liquid, ii' in that refped really a Part of it. Thus the 
Bottom is prels’d both by the Liquid and the Orange 
Body, and luflains them both. But if the Body falls, 
it yields to the Adion of Gravity, and confequently 
the Bottom does no longer fuflam it ; neither will ic 
fuflain it, till the faid Body is come down to the 
Bottom There.fore during the whole Time of the 
fall, the Bottom is eafed of the Weight of that Bo- 
dy, which is no longer fuflain’d by any thing, but 
puili d down by the Caufe of Gravity, to which no* 
thing binders'it from yielding. 
‘ Monfieur Leihitz, to confirm his Notion, propofed 
an Experiment, tie fays, that two Bodies mufl be 
tied to the tw*o Ends of a Thread, the one heavier, 
and the other lighter than. Water, yet fuch as both 
together may fwim in Water : Put them into a Tube 
full of Water, the Tube being tied to one End of 
the Beam of a Bailance whofe other End has a con- 
frepoiiing Weight: Then if we cut the Thread which 
ties the Bodies together (that are of unequal Weight) 
fo that the heavieft may prefently defeend. He fays, that 
in filch a Cafe the Tube would be no longer in 
hrio, but its counterpoifing Weight wou’d preponde- 
‘ race 
