Science: Talking Phone Dials

To save the telephone companies money and to serve better those communities which have both the new dial and the old manual telephone service, Bell Telephone Laboratories invented a device which saves time and reduces errors on calls from dial to manual instruments. Last week the device was demonstrated in Manhattan.

The present system of putting through a dial telephone call is as follows: For each of the first three letters of the called exchange name, and for the four figures of the number and the letter of the party line, the...

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