MATHEMATICAL PAPERS 17 
£-745 
8 
$9; 60 
20 
Anf. £.59 12 
If under either of thefe rules, in the produc, there be no 
figures in the place of pounds, fupply them by one or two 
cyphers. If under the fecond rule, there be but one figure in 
the place of pounds, fupply by prefixing one or two cyphers.* 
The multiplication of pounds, fhillmgs, pence, &c. by 
months and fuch number of days as are not an exact half, third 
part, &c. of a month,may indeed fometimes prove burthenfome ' 
to the mind. 
But by the help of the two fubfequent tables of Lm 
one of the parts of a pound, and the other of the parts of a 
month, the intereft of any fum of money, ' confifting of divers 
denominations of pounds, fhillings, pence, and even farthings, 
for any given) number. of months and days, may, upon the 
principles on ‘which the fecond rule aforegoing is founded; by 
an "esie proceís and. with fafficient accuracy, be computed. 
S send COL EI ae 
* In both thefe rules, TT at pee is fppofed tb be given ‘ee AR &c. 
x Pat if the fum at intere(t be given in dollars, the intereft thereon may be computed 
by the fecond rule ; only obferving, that the figures i in the produé, (of the fum 
by half the time) on the left hand of the comma, will be dollars, and thofé on the 
right band will be the decimal parts of a dollar, - 
