( 744 ) 
FJg. S'. Let therefore EDC be a Tube, fikc 
that made ufe of in the 7th and 8th Experiments, ex- 
cept that the narrower Parc is of a greater length ; and 
let AF and BG he the heights, to which the Water 
would fpontaneoufly rife in the two Tubes E D and D C. 
Exp. 9. If this Tube have its wider Orifice C im- 
merft: into the Water A and be fill’d to any height 
lefs than the length of the wider Part, the Water will 
immediately fubfideto a Level with the point G\ but if 
the Surface of the contain’d Water enter never (b little 
within the fmaller Tube E D, the whole Column D C 
will be fufpended, provided the length of that Column 
do not exceed the height AF. 
In this Experiment it is plain, that there is nothing 
to fuflain the Water at fo great a height, except the 
contadl of the Periphery of the Icfi'cr Tube, to which 
the upper Surface of the Water is contiguous. For the 
Tube D C, by the Suppofttion, is not able to fupport the 
Water at a greater height chan B G. 
Exp. 10 Fig. 6 . When the fame Tube is inverted, 
and the Water is rais’d into the lower- extremity of the 
wider Tube CD, it immediately finks, if the length of 
the fafpended Column D N he greater thanO 5 ; where- 
as in the Tube D E k would be fufpended to the height 
A F. Erom which it manifeflly appears, that the fuf- 
penfion of the Column DH does not depend upon the 
actradion of the Tube D E, but upon the Periphery of 
the wider Tube, with which its upper Surface is in 
contad, 
For the fake of thofe. who are pleas’d with feeing the 
fame thing fucceed in dii^rent manners, we fubjoin the 
two following Experiments, which are in fubhance the 
fame with the 9th and loth. 
Fig. 7. ABC h z Siphon,: in whofe narrower, and 
fborter Leg ^ if it were of a fufficient length, might 
be 
