Referee's report by Samuel Walter Johnson Smith, on a paper 'Sources of error in the measurement of the electrical charge of colloidal particles by the method of moving boundaries: an improved method based on a direct measurement of the potential gradient across the boundary' by Jnanendra Nath Mukherjee Sectional Committee: Physics Recommended for publication in the 'Proceedings of the Royal Society of London'. The paper could have been made more concise. Suggests the aguments and reasoning be made clearer. [Published in the 'Proceedings of the Royal Society of London' A, 1923] Endorsed on verso as received 21 September 1922. [September 1922]