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v. Of the rolling or plane Board, 233   vi. Of the Driver for Charging large Rockets, 233 vii. Of Mortars and Pestles, ib. viii. Of the Choaker or Strangler, ib. ix. Of the Table and Sack for mealing Gunpowder, 234 x. Of Sieves, ib. xi. Of the Paper Press, ib.   CHAPTER II. Preliminary operations in the preparation of fire-works, and observations on the preservation of Gunpowder, and sundry manipulations, 235 Sec. i. Of the Workshop, ib. ii. Of the Magazine, ib. iii. Of the Driving or Ramming of Sky-rockets, 236 iv. Of the Boring of Rockets, 238 v. Of the Preservation of Steel or Iron filings, 239 vi. Of the Making of Wheels and other Works incombustible, 240 vii. Of the Formation of Rocket and other Cases, 243 viii. Of Tourbillon cases, 245 ix. Of Balloon Cases, or Paper Shells, ib. x. Of Cases for Illumination Port-Fires, 246 xi. Of Cases and Moulds for Common Port-Fires, 247 xii. Of Pasteboard, and its Uses, 249 xiii. Of the Pulverization of Substances, 253 xiv. Of Mixtures, ib.