When new lines or exchanges are to be built, these men study the situation with an eye to the future.
Nothing that science can say will ever decrease the marvel of a long-distance conversation, and there may come in the future an Interpreter who will put it before our eyes in the form of a moving-picture.
There are many reasons to believe that for the practical idealists of the future, the supreme study will be the force that makes such miracles possible.
There is therefore no immediate danger that the art of telephony will be less fascinating in the future than it has been in the past.
There still remains for some future scientist the task of showing us in detail exactly what the telephone current does.
Here is an Eldorado for the scientists of the future, and whoever can first map it out will go far toward discovering the secret of telephony.
But these random guesses as to the future of the telephone may fall far short of what the reality will be.
Space Age speculation drew on both of these approaches, and of course the Space Age stands out among various futures
because, like the Atomic Age that it overlapped, it seemed to be taking shape.
The value of the Standard & Poors stock index futures
contract, for example, rises and falls according to the price movement of 500 different stocks.