Conservation in the power industry

In the score of years since 1925, the expansion of the electric utility industry has been accompanied by deliberate and sustained reductions in fuel used and in the amounts of materials required to manufacture its equipment. Efficiency of operation with higher temperatures and greater pressures has provided the first saving, and improvement in design and interconnection of systems, the second. However, the author adds, the fuel economy curve is flattening out, and the time is ripe for a new point of attack of the problem.