FOOTNOTES:

[35] This cut is taken from the plate of the engine of the Red Rover, manufactured by Boulton and Watt, given in the last edition of Tredgold on the Steam Engine.

[36] Appendix I., on Marine Boilers, by J. Dinnen; Tredgold on the Steam Engine, second edition.

[37] Tredgold on the Steam Engine, Appendix, I. p. 171.

[38] Engines on a very large scale constructed upon this principle are said to be in process of construction for an iron steam-vessel of great tonnage, which is in preparation for the New York passage. It is said that the cylinders of these engines will be one hundred and twenty inches in diameter.

[39] A patent was subsequently taken out for these by Mr. Galloway. Mr. Field did not persevere in its use at the time he invented it. It has, however, been more generally adopted since the date of Galloway's patent.