The following extracts are given, from their specifying the description, weight, and sometimes the size of the cannon used, with the charge of powder and weight of shot. The great ordnance tried were:-- 1. “An iron demy Canon, of 3500 lbs. weight, and having a cylinder bore, the bullet 32 lb. of iron, the powder 10 lb. 2. “An iron demy Canon, having a taper bore, and being 3600 lbs. in weight, and 4 inches longer than the former, the iron bullet 32 lb. 3. “Experiment with a whole Culverin in brass, of 5300 lbs. in weight, 11 foot one inch in length, with a taper bore, being intended for a chase piece to the frigate called the Speaker; the iron bullet was 18 lbs. in weight, the powder 10 lbs. 4. “A whole Culverin in brass, made at Amsterdam, for the French, with this mark 3580, being 10 foot long, and not very thick in the breech, 18 lb. bullet, and 9 lb. of powder. 5. “An iron Demy Culverin, 9 lbs. iron bullet, and 4 lb. of powder. This half Culverin was shot eight times. 6. “A brass Demy Culverin, the breech 13-5/8 inches, the mouth 9-5/8, 9 lb. iron bullet, 4 lb. of powder.” 65. A way that one man in the Cabin may govern the[6] whole side of Ship-musquets, to the number (if need require) of 2. or 3000. shots. Footnote [6] a--for the. MS. and P. [_For a whole side of Ship-musquets._] The list of five inventions, which appears in the “Life, Times, &c.,” page 316, refers to a similar improvement, viz.: “Oft shooting peards, controlable in one plane, either for number or time.” The 43rd Device, given by Bourne in his “Inventions or Devices,” 1578, is entitled, “How to make any piece of Ordnance go off at any hour or time appointed, by itself, and no person there.” Again, in the 44th Device, we have, “How to make a piece go off when you list, and no person there.” 66. A way that against[7] several Advenues[8] to a Fort or Castle, one man may charge fifty Cannons playing, and stopping when he pleaseth, though out of sight of the Cannon. Footnotes [7] the. MS. and P. [8] avenues. P. [_For guarding several advenues to a Town._] This would appear to be no more than an extended application of the preceding invention. We can imagine that Caspar Kaltoff executed a very beautiful model of this piece of machinery, with its 50 little brass guns, 50 ramrods, &c., all worked simultaneously by a man below, “out of sight of the cannon;” but it is very unlikely that the Marquis would have recommended its adoption; it shows, however, how he persevered in endeavours to abridge human labour. 67. A rare way likewise for musquettoons fastened to the Pummel of the Saddle, so that a Common Trooper cannot misse to charge them, with twenty or thirty Bullets at a time, even in full career.