“…The concentrations of ammonia nitrogen in sweat reported by previous investigators (1,2,3,4,5) varied considerably, for example 2,57-7 mg. per cent in one paper (2), and 5-35 mg. per cent in another (4). In all the cases, however, these values were much higher compared with those of blood, in which less than 0.05 mg. of ammonia nitrogen per 100 cc.…”