EXAMP. 1. London imports from Cadiz goods to the value of 2163 piastres and 4 rials: How much sterling will this amount to, exchange at 38\frac{1}{2} sterling per piastre?

Piast. Rials.
2163 4 at 38\frac{1}{2}d.
d. Rials. 38\frac{1}{2} each.
24 = \frac{1}{4} 216 6 4 = 19\frac{1}{2}
12 = \frac{1}{8} 108 3
2 = \frac{1}{16} 18 0 6
\frac{1}{2} = \frac{1}{32} 2 5 0\frac{1}{2}
\frac{1}{4} = \frac{1}{64} 1 2 6\frac{1}{2}
345 17 1\frac{1}{2}
1 7\frac{1}{2}
L. 345 18 8\frac{1}{2} Ans.

2. London remits to Cadiz 345l. 18s. 8\frac{1}{2}d. How much Spanish money will this amount to, exchange at 38\frac{1}{2}d. sterling per piastre?

Exchange. d. Piast. L. s. d.
If 38\frac{1}{2} : 1 :: 345 18 8\frac{1}{2}
307 614) 1328389 (2163 piastres.
2 6918 1228
12
614 1003
83024 614
16
3898
498149 3684
83024
2149
Carried up 1328389 1842
307
8
Piast. Rials. 614) 2456 (4 rials.
2456
5\frac{1}{2} Soldi make 1 gros
24 Gros make 1 ducat = 50\frac{1}{2}d. sterling.

The money of Venice is of three sorts, viz. two of bank money and the picoli money. One of the banks deals in banco money, and the other in banco current. The bank money is 20 per cent. better than the banco current, and the banco current 20 per cent. better than the picoli money. Exchanges are always negotiated by the ducat banco, the par being 4s. 2\frac{1}{2}d. sterling, as in the table.

Though the ducat be commonly divided into 24 gros, yet bankers and negotiators, for facility of computation, usually divide it as follows, and keep their books and accounts accordingly.

12 Deniers d'or make 1 sol d'or
20 Sols d'or make 1 ducat = 50\frac{1}{2}d. sterling.

The course of exchange is from 45d. to 55d. sterling per ducat.