Referee's report by Thomas Martin Lowry, on a paper 'Relations between optical rotatory power and constitution in the steroids' by Robert Kenneth Callow and Frank George Young Sectional Committee: Chemistry Recommended for publication in the 'Proceedings of the Royal Society of London'. The paper provides a very valuable review of the subject, and should form the basis for further work. [Published in the 'Proceedings of the Royal Society of London'] Endorsed on verso as received 3 June 1936. [June 1936]