Of Orpiment, 187 xxxvi. Of Antimony, 188 xxxvii. Of Carbonate of Potassa, 189 xxxviii. Of Wood Ashes, 192 xxxix. Of Clay, 193 xl. Of Quicklime, 194 xli. Of Lapis Calaminaris, 195 xlii. Of Zinc, 196 xliii. Of Brass, 197 xliv. Of Bronze, 198 xlv. Of Mosaic Gold, 200 xlvi. Of Iron and Steel, 201 xlvii. Of Glass, 210 xlviii. Of Glue and Isinglass, 214 xlix. Of Wood, 216 l. Of Linseed Oil, 218 li. Of Gum Arabic and Gum Tragacanth, 219 lii. Of Cotton, ib. liii. Of Bone and Ivory, 220 liv. Of Galbanum, 221 lv. Of Tow and Hemp, 222 lvi. Of Blue Vitriol, ib. lvii. Of Nitrate of Copper, 223 lviii. Of Strontia, 224 lix. Of Boracic Acid, 226 PART II. Instruments, Tools, and Utensils, 228 CHAPTER I. Of the Laboratory, 228 Sec. i. Of Laboratory Tools and Utensils, ib. ii. Of Mandrils and Cylinders for forming Cartridges and Cases, 230 iii. Of Rammers, Charges, and Mallets, 231 iv. Of Utensils necessary for constructing Signal Rockets, 232 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.