>75 ) 
moved by a little attention to their refpe(5Uve Indesceji. 
In the Divifion of interminate Numbers, the fame 
rehridions are to obtain, as are already mention’d in 
Multiplication. 
And this may fuffice for a fliort Summary of Nega- 
tivo-aiiirmative Arithmetick, as to the ordinary Ope- 
rations of Addition, Subtradtion, Multiplication, and 
Divifion. What improvements may be had from hence 
in the Extraction of Roots, whether of pure or affe- 
ded Equations, I fliall leave to future inquiry. 
But all thefe Operations, whether in the common 
Decimal Arithmetick, or in this here compendioufly 
defcribed ; and not only in Decimal Arithmetick, but 
in the feveral other Species, as Duodecimal, Sexage- 
fimal, Centefimal, &c. all thefe Operations (I fay> 
may be much more eafily and readily perform’d, and 
with equal accuracy, by anlnflrument I have contrived 
call’d AlacuSi or theCounting^Tahle^ which I hope fliort- 
ly to communicate to the inquifitive in thefe matters, 
and by v;hich all long Calculations may be very much 
facilitated. In the mean time this fliort account of Ne- 
gativo-aflirmative Arithmetick, in Denary or Decimal 
* Numbers, may be premis’d, by way of Introduction to 
the knowledge and ufe of the faid Inftrument. 
/ 
II E- 
