[114 3 
felf, was produced in the Hand* If fo, I liilght, by 
a contrary Inclination, produce a Motion the con- 
trary way. Having therefore a fine Day, and rtiy 
circular Cake being- well excitedj I tried if I could 
not produce a regular Mdtiori ffom Eaft to Weft, 
about the Ball in the Centre, having my Hand fup- 
ported, as ufual, upon the Back of a Chair. I found 
I could produce a very regular One frohiEaft to Weft 
for many Revolutions, and change from one Motion 
to another, without being fenfible I mOvcd my Hand 
at all. 
I then wet the Ball and String, as in the Experi- 
ment before-mentioned, and found I could tire my- 
felf with a Motion either from Eaft to Weft, or from 
Weft to Eaft, as I pleafed, without giving any Mo- 
tion, that I could perceive, to my Hand Or Fingers. 
Hence many odd Experiments that pleafe, may, when 
repeated, fucceed. 
Since therefore the Motion of the pendulous Body 
from a Point undoubtedly fixed, is irregular, as I 
have found by many different Experiments, repeated 
with the greareft Care and Caution 5 arid iince I am 
convinced from thefe laft-mentioried Trials, the Mo- 
tion from Weftr to Eaft, and from Eaft to Weft, muff 
generally have been determined by myfelfj I am 
i nclined to think, that a Delire of producing a Mo- 
tion from Weft to Eaft, was the fecret Caufe that 
determined the pendulous Body fo that Diredion, by 
fome Imprellion from Mr. Gtafs Hand, as well as 
my own, though 1 am perfuaded at the fame time, 
he was not fcnfible of giving any Motion to his Hand 
himfelf : And I the rather think this was the Cafe, 
from the Inftance Mr.Gr^^ gives, by way of Expla- 
nation, 
