Referee's report by William Dobinson Halliburton, on a paper 'On the identification of chitin by its physical constants' by Igerna B J Sollas Sectional Committee: Zoology Recommended for publication in the 'Proceedings of the Royal Society of London'. Suggests adding a summary of conclusions. [Published in the 'Proceedings of the Royal Society of London'] Endorsed on verso as received 4 June 1907. [June 1907]