Referee's report by William Augustus Tilden, on a paper 'The electrical conductivity of air and salt vapours' by Harold Albert Wilson Sectional Committee: Physics and Chemistry Recommended for publication in Philosophical Transactions, in full. All the illustrations should be reproduced as in the case of the later paper, in the body of the text. He sees no reason for modifying the paper which gives the results concisely and clearly. [Published in Philosophical Transactions A, 1901]. Endorsed on verso as received 27 March 1901. 26 March 1901