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acid AcOH action added addition alkali base blood boiling Brit cause Chem chim chloride clay color colorless compds conc consists constant containing cooling crystals decomp derivs described detd Determination dissolved distilled effect ester ether excess expts extract filter formation formed formula furnace gases given gives glass H₂O H₂SO heating increased indicate Inst latter less light liquid material means measured metal method milk mixed mixture needles obtained organic oxidation plant plates powder prepared present pressure probably pure quantity reaction reduced removed salt samples separated similar solid soln steel studied substance sugar surface temp treated treatment tube Univ vapor varying yellow yield