EXAMP. I. How much sterling money is equal to 1459 ducats 18 sols 1 denier, bank money of Venice, exchange at 52\frac{1}{2} sterling per ducat?

Duc. d. Duc. sol. den. d.
If 1 : 52\frac{1}{2} :: 1459 18 1
52\frac{1}{2} Sols.
10 =
2918 5 =
7295 2 =
1 =
d. 75868 den. 1 = 0\frac{1}{2}
\frac{1}{2} = 729\frac{1}{2}
\frac{1}{2} = 364\frac{1}{2}
47\frac{1}{2}
76962\frac{1}{2}
47\frac{1}{2}
Rem.
12) 77010(6d.
2) 6417(17s.
L. 320 17 6 sterling. Ans.

2. How many ducats at Venice are equal to 385l. Exchange 12s. 6d. sterling, exchange at 4s. 4d. per ducat?

L. Duc. L.
If .216 : 1 :: 385.625
.216) 385.625
21 385.625
Duc.
195) 347062.5 (1779.8 Ans.
195
1520
1365
1556
1365
1912
1755
1575
1560
(15)

Bank money is reduced to current money, by allowing for the agio, as was done in exchange with Holland; viz. say, As 100 to 120, or as 10 to 12, or as 5 to 6, so the given bank money to the current sought. And current money is reduced to bank money by reversing the operation. And in like manner may picoli money be reduced to current or to bank money, and the contrary.

100 ducats banco of Venice.

In Leghorn = 73 pezzos In Lucca = 77 crowns
In Rome = 68\frac{1}{2} crowns In Frankfurt = 139\frac{1}{2} florins
12 Denari make 1 soldi s. d.
20 Soldi make 1 pezzo = 4 6 sterling.

Books and accounts are generally kept in pezzos, soldi, and denari; but some keep them in livres, soldi, and denari; and 12 such denari make 1 soldi, and 20 soldi make 1 lire.

The pezzo of exchange is equal to 5\frac{1}{2} lires; and, consequently exchange money is 5\frac{1}{2} times better than the lire money. The course of exchange runs from 47d. to 58d. sterling per pezzo.