( 395 ) 
III. An Account of an Experiment touching the Di - 
reSiioh of a Drop of Oil of Oranges j between two 
Glafs Dianes , towards any fide of them that is near eft 
prefs'd together. By Mr. Fr. Hauksbee, F. ([{.S, 
T H S Glafs Planes which I ufed were about 6 In- 
ches fquare ; and being very clean, a drop or two 
of Oil of Oranges was let fall on the lower Plane, fup~ 
pofe at B 5 then the upper Plane was laid oo if, fo near 
as to touch the Liquid, that it might become Contiguous 
B 
to both their Surfaces. Thus the Planes being made t© 
touch one another at the fide A, and opened at the 
fide C, as in the Scheme above, the lower Plane lying 
parallel with the Horizon^ the drop of Oil would imme- 
diately move towards the touching fide of the Planes ; 
and when it was arrived there, it was but reversing the 
Angle, and the Drop would return from A to G j and 
after the fame Manner it might be directed to any fide 
or part of the fame. Moreover, if the Planes were ele- 
vated S or io Degrees at A, yet would the Drop af- 
cend towards the fide A, tho’ not fo fwift as when the 
Planes were in the fore-mentioned Pofition. It was 
farther to be obferved, that the nearer the Drop ap- 
proached the touching fide, fo would the Velocity of 
its Motion be encreaRd ; The. ireafou of which feems 
Teiy 
