[227]

Howes, op. cit.

[228]

Macallum. Reprinted from Proc. Canadian Instit. N.S. ii. 1884, p. 387.

[229]

Howes, op. cit.

[230]

Howes, P.Z.S. 1890, p. 669.

[231]

Balfour and Newton Parker, Phil. Trans. 173, 1882, p. 425.