Page 115, para. 2, for “plate 21, fig. 3,” read “plate 22, fig. 3.”
Page 119, para. 3, line 1, after “moving,” insert “in.”
Plate 21, fig. 5, should be lettered as fig. 4. plate 22.
HISTORY OF GUNPOWDER.
The History of Gunpowder may well form a prelude to that of Fire Arms, as the existence of the latter is wholly dependent on the discovery of the former. Of all the discoveries which have been made, there is, perhaps, none which has produced more important consequences to mankind than the discovery of Gunpowder, as by introducing fire-arms, and a new method of fortifying, attacking, and defending Towns, it wrought a complete change in the whole art of war.
Knock’s opinion.
The invention of Gunpowder is completely involved in obscurity, and this very fact is one great proof of its antiquity. Knock observes that the invention of Gunpowder comprises several discoveries, which it is necessary to distinguish from each other.