[10]. Mineralogical Magazine, 1888, 8, 37.

[11]. Journ. Chem. Soc., 1896, 69, 507.

[12]. Ann. de Chim. et Phys., 1848, 24, 28 and 38; also 1850, 28, 56; Comptes Rendus, 1848, 26, 535; also 1849, 29, 297; also 1850, 31, 480; also 1853, 37, 162, and 1858, 46, 615.

[13]. Journ. Chem. Soc., 1891, 315.

[14]. Ibid., 1897, 989.

[15]. Journ. Chem. Soc., 1891, 59, 233.

[16]. Ibid., 1891, 59, 96.

[17]. Phil. Trans. Roy. Soc., 1895, A, 185, 913.

[18]. Mineralogical Magazine, 1892, 10, 123.

[19]. Journ. Chem. Soc., 1906, 89, 413; Proc. Roy. Soc., A, 1907, 79, 322.