13 Experiments on Fluoric Acid and Fluates _ib._ 14 Crystallization of Phosphorus 206 15 Solution of Phosphorus in Oils _ib._ 16 On the Inflammation of Powder, when struck by Brass 207 17 Cementation of Iron by Cast Iron _ib._ 18 On the Preparation of Ferro-prussiate of Potash _ib._ 19 Sulphocyanide of Potassium in Saliva 208 20 Decomposition of Sulphate of Copper, by Tartaric Acid _ib._ 21 Separation of Arsenic from Nickel, or Cobalt 209 22 Chemical Researches into Certain Ancient Substances 209 23 Compounds of Gold 210 24 On the Bitter Substance produced by the Actions of Nitric Acid on Indigo, Silk, and Aloes _ib._ 25 On the Existence of Crystals of Oxalate of Lime in Plants 214 26 Fallacy of Infusion of Litmus as a Test _ib._ 27 Tests for the Natural Colouring Matter of Wine 215 28 Test of the Presence of Opium _ib._ 29 Denarcotized Laudanum _ib._ 30 Extraction of Morphia from Dry Poppy Heads 216 31 Preparation of Morphia _ib._ 32 Easy Method of Obtaining Meconic Acid 217 33 On a New Vegetable Acid _ib._ 34 Altheine, a New Vegetable Principle _ib._ 35 Rheine, a New Substance from Rhubarb 218 36 On Dragon’s Blood, and a New Substance which it contains _ib._ 37 Purification of Madder 219 38 On Indigo, and Indigogene 220 39 On the Mutual Action of Ethers, and other Substances 221 40 Faraday’s _Chemical Manipulation_ _ib._ III. NATURAL HISTORY. 1 On the Supposed Influence of the Moon 222 2 Luminous Appearances in the Atmosphere _ib._ 3 On the Determination of the Mean Temperature of the Air 223 4 Indelible Writing _ib._ 5 Peculiar Crystals of Quartz _ib._ 6 Native Iron not Meteoric 224 7 Native Argentiferous Gold 225 8 Prothéeïte, a New Mineral 226 9 Volcanic Bisulphuret of Copper _ib._ 10 Fall of the Lake Souwando, in Russia 227 11 Vegetable Torpor in the Root of the Black Mulberry Tree 228 12 Method of increasing the Odour of Roses _ib._ 13 Pine Apples _ib._ 14 Mode of Condensing Vegetable Substances for Ship’s Provisions 229 15 Rewards for the Discovery of Quinia, and for Lithotrity _ib._ 16 Upon the Gaseous Exhalations of the Skin 230 17 Effects of Galvanism in Cases of Asphyxia by submersion _ib._ 18 Recovery from Drowning 231 19 Preservation of Cantharides _ib._ 20 Chloride of Lime in cases of Burns _ib._ 21 Cure of Nasal Polypi 232 22 Bite of the Viper _ib._ 23 Experiments on the Poison of the Viper _ib._ 24 Destruction of Moles _ib._ 25 On growing Salad Herbs at Sea 233 26 Chinese Method of Fattening Fish 234 Meteorological Diary for the Months of June, July, and August, 1827 236 CONTENTS. _Oct.–Dec._ 1827. On the Means generally used with the Intention of curing a Stoop. By the late Mr. SHAW 237