Referee's report by Ralph Howard Fowler, on a paper 'The statistical mechanics of many component gases' by Klaus Fuchs Sectional Committee: Physics Recommended for publication in the 'Proceedings of the Royal Society of London'. Refers to work of Maria Goeppert Mayer, Ralph Howard Fowler and Johannes Diderik van der Waals. The paper contains a valuable advance on the general statistical theory. The second half of the paper is of lower quality than the first half. The theoretical discussions should be published as soon as possible. The remainder should be published separately elsewhere, such as the Transactions of the Faraday Society. Contains extra question - 'Is there any information contained in the paper which likely to be of value to the enemy?' Referee replies no. [Published in the 'Proceedings of the Royal Society of London'] No received date. [1941]