Referee's report by Thomas Ralph Merton, on a paper 'Note on the series spectra of the aluminium sub-group' by J A Carroll Sectional Committee: Physics Recommended for publication in the 'Proceedings of the Royal Society of London'. Refers to work of Walter Grotrian. [Published in the 'Proceedings of the Royal Society of London' A, 1923] Endorsed on verso as received 10 March 1923. [March 1923]