Automatic transmission of power readings

The need of information at one point as to power conditions in large systems for load dispatching, billing, or other purposes has led to the development of various methods of transmitting power readings over long distances. The development of superpowet emphasizes this need and the perfection of means of communicating complete information as to power and load conditions will hasten the development of superpower. We wish to discuss various automatic methods which may be employed for remote metering. Our paper will describe the following methods: