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Knight's Mechanical Encyclopedia (ed. Knight), C. (search)
oaders, specimens of which are preserved in the Artillery Museum of Woolwich, England. The charge was inserted in an iron cylinder, which was fixed by wedges in its place in the breech of the gun. Breech-loading cannon were introduced by Daniel Spekle, who died in 1589, and by Uffanus. Cannon of ice were made at St. Petersburg in 1740, and repeatedly fired, — a whim. All the rifled cannon in the British service of less than 6 3-inch caliber are breech-loaders. At the siege of Badajoz, the firing was continued for 104 hours, and the number of rounds fired from each 24-pounder iron gun averaged 1,249; at the siege of St. Sebastian each piece was fired about 350 times in 15 1/2 hours. But few of these pieces were rendered unserviceable; but it is estimated that three times the number of brass guns would have been required to produce the same effect, or maintain such long and rapid firing. An experimental Armstrong 32-pounder, weighing 26 cwt., with a charge of 6 pounds
Knight's Mechanical Encyclopedia (ed. Knight), M. (search)
trace of any accusation against the Florentine navigator. Columbus himself, a year before his death, speaks of Vespucci in terms of unqualified esteem; he calls him a very good man, worthy of all confidence, and always inclined to render me service. The same good — will toward Vespucci is displayed by Fernando Colon, who wrote the Life of his father in 1535 in Seville, four years before his death, and who, with Juan Vespucci, a nephew of Amerigo's, was present at the astronomical junta of Badajoz, and at the proceedings respecting the possession of the Moluccas. The confusion of dates in the numerous versions of Amerigo's voyages is not to be attributed to him, as he did not himself publish any of these accounts; such mistakes and confusion of figures are, moreover, of very frequent occurrence in writings published in the sixteenth century. The entire guiltlessness of the Florentine navigator, who never attempted to attach his name to the new continent, but the magniloquence