sulphides of, [381]
orpiment (Burdock’s case), [382], and note
acid, [382]
arsenates, [383]
trichloride, Arseniuretted hydrogen, [383]
extraction and tests, distribution, occurrence in soils, [384]
modification of old process, [385-7]
Marsh’s, [388]
Reinsch’s, [390]
doses, medicinal, poisonous, [391]