f 74' ) 
Mr. Havphslce's Obfervation is as follows. 
z. Let A B F C he a capillary Siphon, into 
the which the Water will rife above the Level to the 
height CF, and let B A \>q the depth of the Orifice 
of its longer Leg below the Surface of the Water D E. 
Then the Siphon being fill’d with Water, if B A be not 
greater than C F, the Water will not run out at A, but 
will remain fufpended. ** 
This feems indeed very plaufible at fiirfi: fight. For 
fince the Column of Water FC will be rufpended by 
fome power within the Tube, why fliould not the Co- 
lumn B A, being equal to, or lefs than the former, 
continue fufpended by the fame Power ? 
Exp. 4. In fad, if the orifice C be lifted up out of 
the Water D E, the Water in the Tube will continue 
fufpended, unlefs 5 ^ exceed FC. 
Exp, 5". But when C is never fo little immerft in the 
Water, immediately the Water in the Tube runs out in 
drops at the Orifice Ay tho’ the length A B ho confide- 
rably lefs than the height C F. 
Mr. Hair kshee in his Book of Experiments has advan- 
ced another Obfervation, namely, that the fhorter Leg 
of a Capillary Siphon, asABFCy muH be immerft in 
the Water to the depth /^C, which is equal to the height 
of the Column*, that would be fufpended in it, before 
the Water will run out at the longer Leg. 
Exp, 6 . From what miftake this has proceeded, f 
cannot imagine ; for the Water runs out at the longer 
1-cg, as foon as the Orifice of the Ihorter leg comes 
to touch the Surface of the ftagnant Water, without 
being at all immerft therein. 
Having proceeded thus far in obedience tothe com- 
mands of this llluftrious Society, I beg leave to go a 
little farther, and to enquire into the caufe of the aicent 
and fufpenfion of Water in capillary Tubes. 
B b b b b b 2 
That 
