C 444 3 
The famd might be deduced without the method 
of complements, but neither in fo fhort nor fatisfac- 
tory a way, and it fhall therefore be omitted. I have 
communicated this upon account of its perfpicuity, 
and fuppoling, that in an age fo greatly advanced in 
mathematical learning, the lead; hint of what is new 
would not be unacceptable. 
Queen’s Square, TVeftminfter, 
May 7 j 1752, 
LXXV. 
