an instrument for measuring the percentage of ammonia in an aqueous solution.
1873. Fownes, Chem., 156. Ammonia gas is colourless.
1879. Athenæum, 30 Aug., 277/3. The ‘ammonia process’—a process which has been developed by M. Ernest Solvay, of Brussels.
1864. Chem. News, 16 April, 188/1. It possesses the pale reddish amethystine colour of ammonia-iron-alum.
1849. Mrs. Somerville, Connex. Phys. Sc., xxiv. 227. Paper prepared with the ammonia-citrate of iron.
1875. Ure, Dict. Arts, I. 140. Mr. J. J. Griffin has constructed a useful instrument called an Ammonia-meter.
