[ 87]Mining Engineer, 1865, vol. 35, p. 86
[ 88]The Engineer, 1865, vol. 20, p. 174
[ 89]Mechanics' Magazine, 1866, vol. 16, p. 147
[ 90]Bessemer, op. cit. (footnote 7), p. 294
[ 91]Ibid.
[ 87]Mining Engineer, 1865, vol. 35, p. 86
[ 88]The Engineer, 1865, vol. 20, p. 174
[ 89]Mechanics' Magazine, 1866, vol. 16, p. 147
[ 90]Bessemer, op. cit. (footnote 7), p. 294
[ 91]Ibid.