On the other hand, we miss in the course such subjects as cambistry (science of exchange) , political economy, as well as some essential features of bookkeeping and accounting, the importance of which is beyond question in commercial practice.
Source: wiktionary
The science of exchange, or, to use the old word, cambistry, has always been a subject of great importance.
Source: wiktionary
Cambistry involves a knowledge of various countries of the world; weights, measures, and fineness of metals used as a basis of coinage in various countries; methods of dealing in bullion; assaying operations; issuance of bills of exchange, international checks, and postal money orders; commercial parities; and computations in the arbitration of exchange.
Source: wiktionary