[42] "Practical Mechanic's Journal," vol. i., 1853.
[43] The number of steam vessels belonging to the United Kingdom in 1849 was only 1142, of 158,729 tons; Sweden, which was second among the nations of the world, had only about one-tenth of this tonnage.—Porter's "Progress of the Nation," page 626.
[44] Holmes' "Marine Engineering," page 74.
[45] Rankine's "Steam Engine," page 502.
[46] "Transactions of the Institution of Naval Architects," vol. xxviii., page 141; and vol. xxx., page 278.
[47] Lindsay's "Merchant Shipping," vol. iv., page 434.
[48] "Proceedings of the Institution of Naval Architects," vol. xi., page 152.
[49] Lindsay's "Merchant Shipping," vol. iv., page 435.
[50] Pollock's "Modern Shipbuilding, and the Men Engaged in it," page 199.
[51] "Proceedings of the Institution of Mechanical Engineers" (1901), page 608.