An article based on a paper with the full title ‘Stray losses in squirrel-cage induction motors: validity of the reverse-rotation test method’, which is published this month in the Proceedings. The paper has been reserved for reading at a meeting of the Power Division at Savoy Place on a date yet to be arranged in 1964. Dr. Chalmers was formerly with the English Electric Co. Ltd., and is now at the Manchester College of Science and Technology. Mr. Williamson is with the English Electric Co. Ltd.