Referee's report by Thomas Edward Allibone, on a paper 'Constitution and mechanism of the selenium rectifier photocell' by J S Preston Sectional committee: Physics Recommended for publication in Proceedings, after modification. The paper could be greatly condensed and the phraseology is very loose in places. The introduction states more than is necessary and there is too much repetition ibn the conclusions. [Published in Proceedings of the Royal Society A, 1950]. Date received not given. 1949