INDEX 
327 
Detection of poisons in the urine, - - - - 118 
u of stearine and stearic acid in \vax ; - - 214 
Donovan's solution, preparation of - - 93 
Drimys chilensis, - - - - - 81 
" winteri, - - - - - 161 
English rhubarb, queries relative to - - 199 
Etching daguerreotype plates, - 235 
Essential oils in starch, pre-existence of - - 136 
Experiments on valerianic acid, ... - 283 
Extract of Indian Hemp, ----- 195 
Extraction of strychnia, ... - - 98 
Epsom salts in solution, removal of the bitter taste of - 300 
Fluid extract of rhubarb, - 182, 262 
" " of valerian, ... - 83, 184 
Fruit of Myroxylon toluiferum,] - - - 116 
Gelatine sugar, composition of - - - - 78 
Gelatine, products of the decomposition of - - - 29 
Green ink, - - - - - - 23 8 
Gum, on the preparation of artificial - - 284 
Gutta percha, chemical examination of - - - 141 
" history of the introduction of - 137 
Hemp resin, process for preparing 39 
Hemp, extract of Indian - - - - 195 
Honey, its varieties and clarification, - - - . 228 
Hydrated oxide of iron, alteration of, under water, - - 62 
Indian hemp, extract of - - - - 195 
India rubber, on the vulcanization and conversion of - 206 
Ink, green ------- 238 
Ink, on the preparation of marking - - - 103 
Iodide of iron, on syrup of - - - - 101 
" of lead, preparation of 298 
" of potassium, easy process for - - - 239 
Iodine, advantageous method of extracting - - 301 
Iron, by hydrogen, - - - - - -15 
" alteration of hydrated oxide of - 62 
" tannate of, in chlorosis - - - -61 
Lactic acid, its formation ----- 77 
