Referee's report by John William Nicholson, on a paper 'Aberration diffraction effects' by G C Steward Sectional committee: Mathematics Recommended for publication in Philosophical Transactions. The paper will be 'very expensive' to print. He does not know what can be cut out. [Published in Philosophical Transactions A, 1926]. Endorsed on verso as received 25 January 1923. January 1923