Referee's report by William Cudmore McCullagh Lewis, on a paper 'On the surface potentials of unimolecular films of ergosterol.— The photochemical formation of vitamin D' by Russel J Fosbinder Sectional committee: Chemistry Recommended for publication. There is no conclusive proof that the author's views represent the only interpretation of data obtained. However, the subject is still actively under investigation so this inconclusiveness is to be expected. [Published in Proceedings of the Royal Society A, 1933]. Endorsed on verso as received 23 July 1932. July 1932