Note 42 — Chapter V

Nicholas Wood, "Practical Treatise on Railways," ed. 1825, p. 294. These passages will be found in the first edition of Mr. Wood's work, published in 1825. The subsequent editions do not contain them. A few years' experience wrought great changes of opinion on many points connected with the practical working of railways, and Mr. Wood altered his text accordingly. But it is most important for our present purpose to note that, in the year 1825, long before the Liverpool and Manchester line was opened, Mr. Wood should have so clearly described the steam-blast, which had been in regular use for more than ten years in all Stephenson's locomotives employed in the working of the Killingworth railway.