( I6« ) 
I. A Pjort Account of Negativo' affirmative Arith~ 
metickj by Mr. John Golfon, F, R, S. 
HE Urefulnefs of this Arithmetick confi-ls in 
this, that it performs all the Operations with 
more Eafe and Expedition than the common Affirma- 
tive Arithmetick, efpecially in large Numbers ; And 
it differs from the common Arithmetick chiefly in this, 
that it admits of Negative Figures promifcuoufly with 
the affirmative. Thefe negative Figures are diftinguilli’d 
from the Affirmative, by the Sign - placed over them. 
Thus 3709x^6573961472 is one of thefe Numbers, 
which may be converted into its Equivalent common 
Number 23087264^20^9468, in this manner : 
Write down all the affirmative Figures by 
themfelves, putting a Cypher in the place of every 
negative Figure. { 1 .^ Write down all the negative 
Figures by themfelves, putting a Cypher in the place 
of every affirmative Figure. C3.) Subtradt the lafl 
Number (rom the firft, and the Remainder will be a 
common Number, equivalent to the given negativo- 
affirmative Number. See the Operation above. 
But the readieft pradfical Way of performing this 
Redu(9:ion in any given Number, wdll be in this man- 
ner: Begin at the left hand ; and going over all the 
Figures in order, obferve thefe Rules. (i J An af- 
3009006503000470 
0700280070961002 
2308726432039468 
Y 
firmative 
