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The best way of purifying the alkaloid is by recrystallizing its gold salt several times, so as to obtain it in brilliant yellow plates, melting at 320 deg. F. By passing a stream of hydrosulphuric acid gas through the liquor the gold is precipitated in the form of sulphide.
Along with water, gas, and electricity, the pupils have at their disposal a faucet from whence they may draw the hydrosulphuric acid which is so constantly used in laboratory operations. The architect of the new school is Mr. Denfer. By Rev.
Treated with water, they dissolved, and the solution, when brought into contact with liquid hydrosulphuric acid, precipitated yellow sulphur of arsenic, particularly when one heated it and added a few drops of hydrochloric acid. The question now was forward as to where the arsenic found in the body had come from.
Forbes, "the water on the eastern side of the lagoon was observed to be rising up from below of a dark color. The color was of an inky hue, and its smell 'like that of rotten eggs. ... Within twenty-four hours every fish, coral, and mollusc in the part impregnated with this discoloring substance probably hydrosulphuric or carbonic acid died.
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