Paper, 'A new test for albumin and other proteids' by J A [John Alexander] MacWilliam MacWilliam writes: 'Salicyl-sulpkonic acid is a remarkably powerful precipitant of proteid substances; it is an extremely delicate reagent for the detection of proteids in solution; it acts upon all the classes of proteid bodies.' Annotations in pencil and ink. Subject: Biology / Chemistry Received 5 March 1891. Read 19 March 1891. Communicated by William Roberts. A version of this paper was published in volume 49 of the Proceedings of the Royal Society as 'A new test for albumin and other proteids'. 1891