Ti oa Mr. 'V ince on the Motion of 
the found of the moving force when it arrived at the fhge, the 
j pace could he very accurately adjufted to the time; the fhge 
was then removed to that point to which the moving force 
-would defcend in upon iuppofition that the fpaces deicribed 
by the moving power were as the fquares of the times ; and the 
fpace was found to agree very accurately with the time the 
fhge was then removed to that point to which the moving 
force ought to defcend in 2 ;/ , upon the 'fame fuppclition, and 
the defcent was found to agree cxadlly with the time ; laftly, 
the ft age was adjufted to that point to which the moving force 
ought to defcend in i", upon the fame fuppofttion, and the 
fpace was obferved to agree with the time. Now, in order to 
find whether a difference ill the tune of defcent could be ob- 
ferved, by removing the fhge a little above and below the por- 
tions which correfponded to the above times, the experiment 
was tried, and the defcent was always found too foon in the 
former, and too late in the Litter cafe ; by which I was affined 
that the fpaces ftrft mentioned correfponded exactly to the 
times. And, for the greater certainty, each defcent was repeated 
eight or ten times; and every caution ufed in this experiment 
was alfo made ufe of in all the following. 
Exp. 2. A fecond body was laid upon the horizontal plane, 
• and a moving force applied which defcended 41 f inches in 3" ; 
the fhge was then adjufted to the fpace correfponding. to 2", 
upon fuppofttion that the fpaces defcended through were as the 
fquares of the times, and it was found to agree accurately with 
•.the time ; the -ftage was then adjufted to the fpace correfpond- 
dng to 1 A upon the fame'fuppofition, and it was found to agree 
-with the time. 
Exp. 3. A third body was laid upon the horizontal plane, and 
; a moving force applied, which defcended 594. inches in 4 // .; the 
