[132] Vol. ii. pag. 55.
[133] Phil. Trans. vol. lxxvi. pag. 133.
[134] Journal de Physique, tom. xliii. 323.
[135] That is, alumn containing sulphate of potash.
[136] The production of ammoniac in this process was observed by Kirwan and Austin.
[137] Solution of sulphure of strontian, or barytes, should be used. During the conversion of nitrous gas into nitrous oxide by those bodies, a thin film is deposited on the surface of the solution. This film examined, is found to consist of sulphur and sulphate. Possibly the nitrous gas is wholly decomposed by the hydrogene of the sulphurated hydrogene in the solution, whilst the sulphate is produced from water decompounded by the sulphur to form more gas for the saturation of the hydro-sulphure.
[138] As was first observed by Priestley and Austin, and as I have proved by many experiments.
[139] As I have found by experiment.
[140] As was observed by Milner. Nitrous gas passed over heated zinc, or tin, I doubt not will be found converted into nitrous oxide.
[141] Annales de Chimie, xxxii. p. 3.