Referee's report by Cecil Frank Powell, on a paper 'The transformation of the heavy nitrogen isotope into carbon and helium by bombardment with protons' by W Cochrane and A G Hester Sectional committee: Physics Recommended for publication in Proceedings. Some amendments should be made thought these are not sufficiently important enough to re-submit the paper to the author. The summary should be redrafted. [Published in Proceedings of the Royal Society A, 1949 with the title 'The transformation of the nitrogen isotope of mass 15 into carbon and helium by bombardment with protons']. Date received not given. 1949