( 5?9 ) 
X. An Account of an Experiment touching the Af- 
cent of Water between two Glafs P lanes, in an 
Hyperbolic 4 Figure. By Mr. Francis Hauksbee, 
F. R. S. 
I Took two Glafs Planes, each fomewbat more than 
20 Inches long, of the trueft Surfaces I could pro- 
cure. Thefe being held clofe together at one of their 
Ends, the other Ends were opened exactly to an Angle 
of 20 Minutes. In this Form they were edgeways put 
into a Trough of ting’d Water, which immediately 
arofe between them in the Figure of the annexe Scheme . See Fi*. 7. 
At another time the Planes were opened to an Angle of 
40 Minutes 5 then the Water appear’d between them, 
as in the Scheme with that Title. By thefe Schemes See Fj ’g 6 - 
the Proportions of the Power of Attraftion are in fome 
meafure evident to the Eye i for there may be feen at 
the feveral Diftanees, how many Lines (which are i2ths 
of Inches) the Water is elevated, and the prodigious 
Increafe of them near the touching Ends. I hope the 
Tables are pretty accurate 5 for after many tryals, I find 
the SucceflVs to be much the fame, according to the dif- 
ferent Angles. This Experiment was firft made by Mr. 
Brook Taylor , as appears by his Letter to Dr. Hans 
Sloaue , R. S. Seer, but he confeffes his Apparatus nos 
nice enough to difeover exactly the Figure which the 
Water made between the Planes- 
D d d d 2 
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