( »M ) 
of the fracbaa, and afterwards concreted by the 
Heat of the Part. As this may ferve to explain the 
remarkable Cafe of fulphs, fo I thought it worth 
being communicated to the Society. I am, 
With great Refpeti, 
June 17. Tour very humble Servant , 
I73>. 
Frank Nicholls. 
V. An Account of an Experiment explaining a 
mechanical Taradox, viz. that two Bodies of 
equal Weight fufpended on a certain fort of 
Balance \_as in Tab.. Fig. 2.3 do not lofe their 
^Equilibrium, by being removed one farther 
from , the other nearer to the Center. By the BeV. 
T. J. Defaguliers, L. L. B. & F. Be S. 
Propolition. 
I F the two Weights P,W, in Fig. 3. hang at the Ends 
of the Balance A B, whofe Center of Motion is C ; 
thofe Weights will aftagainft each other (becaufe their 
Directions are contrary) with Forces made up of the 
Quantity of Matter in each multiplied by its Velo- 
city j that is, by the Velocity which the Motion of 
the Balance turning about C will give to the Body 
fufpended. Now the Velocity of an heavy Body is 
its perpendicular Afcent or Defcent, as will appear 
R by 
