( 5?8 ) 
IX. Tart of a Letter from Mr. Brook Taylor, 
F.TfS. to Dr. Hans Sloane %S. Seer. Con- 
cerning the Afcent of Water between two Glafs 
Planes. 
r TT^ H E following Experiment feeming to be of ufe, 
in difeovering the Proportions of the Attractions 
ot Fluids, I fhall not forbear giving an Account of it$ 
tho’ i have not here Conveniences to make it in fo 
fuccefsful a manner, as I could wi(h.- 
I fatten'd two pieces of Glafs together, as flat as I 
could get $ fo that they were inclined in an Angle of 
about 2 Degrees and a half. Then I fet them in Water, 
with the contiguous Edges perpendicular. The upper 
part of the Water, by riling between them, made this 
Hyperbola - 0 [See Fig . 5.] which is as I copied it from the 
Gh*fs. 
I have examined it as well as I can, and it feems to 
approach very near to the common Hyperbola. But my 
Apparatus was not nice enough to difeover this exattly. 
The Perpendicular Affymptote was exa&ly determined 
by the Edge of the Glafs ; but the Horizontal one I could 
not fo well difeover. I am, 
Sir , 
Tour mojl humble Servant , 
BROOK TAYLOR. 
Bifrotts near Can- 
terbury, June 
3S- *7*2. 
X, An 
