C '*p 3 
Leave to lay before you fome farther Obfervations 
I have fince made, which will, I hope, in great mea- 
fure, account for the Fads then related. 
In my former Account I took Notice, that the 
two Clocks were in feparate Cafes, and that the Backs 
of them refted againft the fame Rail ,• that the Pen- 
dulums, when at Reft, were about two Feet afunder, 
and weighed about 23 ife each, and were made to 
move with fuch Freedom, that a Weight of 3 lb. 
would caufe either of the Pendulums to defcrlbe an 
Arch of three Degrees. The moft remarkable Par- 
ticulars then obferved in them were thefe : If the Pen- 
dulum of one of the Clocks, which (for Diftindtion 
fake) I called N« 2. was left at Reft, and that of the 
other, which I called N« 1. was fet a going, this 
would, in about 16 Minutes, communicate fo great 
a Quantity of Motion to N° 2. as would make its 
Pendulum defcribe an Arch of above two Degrees, 
and would fet the Work a going : That the Motion 
of the Pendulum of N° i. conftantly decreafed as 
that of N°2. increafed, and after about 30 Minutes 
it did not defcribe an Arch fufficient to free the Teeth 
of the Wheel from the Pallets, fo that the Clock 
flopped. At the fame time the Pendulum of N° 2. 
defcribed an Arch of five Degrees, which was two 
Degrees more than it would have done, had it not 
been affefted by the Motion of N° i. Upon leaving 
the Pendulum of N° i. at Reft, and fetting N« 2. 
a going, the Pendulum of N° i. was found to be but 
little affeded, and never moved fufticiently to fet the 
Work a going. Thefe feemingly different Effeds, 
which the two Clocks had upon each other, I fhall 
now endeavour to account for. 
K. 
The 
