[ JM ] 
in the pendulous Body> and fometimes thought I have 
felt fomething like it in my Arm that held it, though 
at no other time have I ever been fenfible of any fuch 
thing. 
I have feveral times fince repeated this Experiment 
with the Thread and Bali both wet, and found it 
fucceed much better than when they were both dry j 
and once I find by my Notes I had two hundred and 
twenty Revolutions before I refted my Arm. I have 
tried too with the Ball dry, and the String only made 
wet ; but the Virtue did not continue fo long, as when 
both were wet. 
I now flattered myfelf with Hopes of Succefs, if 
the Thread was fufpended from an undoubted fixed 
Point, which therefore I proceeded again to try with 
the greateft Care and Caution, but in vain j the Re- 
volutions were uncertain. 
This Difference naturally led me to refledt upon 
the Caufe of it. The Tremor of the Hand would 
not account for it ; for this being both ways back- 
ward as well as forward, muft as often hinder as pro- 
mote a continual Motion one way : And though in 
two oppofite Parts of a Circle, the Motion is really 
in contrary Diredions, and therefore the contrary 
Impulfes of a Ttemor tnay promote a Revolution 
applied at oppofite Places of the Orbit ; yet as thefe 
Tremors are irregular, . apd fucceed much quicker 
than the Revolutions are perform’d, they feem infuf- 
ficient to account for the Motions of the pendulous 
Body, performed with any Degree of Regularity. 
A Stream of Air in my Room might impel along* 
the Tangent tfie pendulous ?ody, kept at a Diffance 
from the Ball by its repulfive |^ort:e ^ and then Gravity, 
0^ taking 
