on converging Seriefes. $3 
In the Medit. Algebr. fomewhat has been added concerning 
impoflible, affirmative, and negative values of the unknown 
quantities in an equation which involves two or more unknown 
quantities ; and alfo was firfl delivered a rule from the number 
of affirmative, negative, and impoflible roots of an equation 
being known to find the number of impoflible, negative, and 
affirmative roots of an equation, whofe roots have a given 
algebraical relation to the roots of a given equation ; on which 
two lafl: fubjedts little, I believe, had been before publifhed. 
M 2 
