Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. The reliability Of Operation of the electric locomotive, and its flexibility of control, have been proved and the advantages that may be expected from el/ectric operation are well known. Electric locomotives are operating successfully over a length of continuous line 440 lines long and during 24 consecutive hours a single locomotive has been able to attain a mileage of 766 miles, while the monthly mileage has reached the high figure Of more than miles. The economy in fuel con sumption per unit of power delivered at the drawbar will become Of increasing importance as available fuel resources decrease.