The exchanges of domestic products are less important than they should be.
In a large city, where several inter - connected exchanges have to be built and thousands of subscribers are put into communication with each other, the service is at once more costly and more valuable than in a small town with a few hundred subscribers accommodated in one exchange.
It is not practicable to connect each subscriber directly to all the others, hence a system of exchanges has been adopted.
Subscribers to exchanges may also make arrangements to have all telegrams (except Press telegrams) ad - dressed to them delivered by telephone instead of messenger.
After bold and repeated overtures for an exchange of prisoners - an important matter, both because the American frigates had no place in which to - stow away their prisoners, and because of the maltreatment _ of American captives in such prisons as Dartmoor - exchanges began at the end of March 1779, although there were annoying delays, and immediately after November 1781 there was a long break in the agreement; and the Americans discharged from English prisons were constantly in need of money.