Abstract :
Progress in the art since 1900 is discussed in this second in a series of four articles on the historical background of the art sponsored by the AIEE committee on instruments and measurements, the first of which appeared in the September issue DURING THE YEARS from 1900 to the present, the art of metering continued to develop. This period may be divided roughly into two parts: from 1900 to 1925; and from 1925 to the present. During the first part of the century progress was mainly in the direction of improvements in methods; after 1925 the art might be said to have reached its majority, but this does not imply that progress ceased. Meters were adapted to changing sociological requirements, and improvements in accuracy, accessibility, and durability continued to be made.
