[1]. See page [57] for explanation of indices.

[2]. Proc. Roy. Soc., 1908, A, 81, 40.

[3]. Comptes Rendus, 1842, 15, 350, and 1845, 20, 357.

[4]. Comptes Rendus, 1848, 27, 611, and 1849, 29, 339.

[5]. Jahresbericht, 1849, 19.

[6]. Comptes Rendus, 1848, 26, 535.

[7]. Journ. für Prakt. Chemie., 1865, 94, 286.

[8]. Mem. R. Accad. di Torino, 2A, 17, 337, and 20, 355.

[9]. Pogg. Ann., 141, 31.