If the incrustation be white and readily volatile, arsenic is present, if more difficultly volatile and beads are present, antimony; zinc gives an incrustation yellow whilst hot, white on cooling, and volatilized with difficulty; tin gives a pale yellow incrustation, which becomes white on cooling, and does not volatilize in either the reducing or oxidizing flames; lead gives a lemon-yellow incrustation turning sulphur-yellow on cooling, together with metallic malleable beads; bismuth gives metallic globules and a dark orange-yellow incrustation, which becomes lemon-yellow on cooling; cadmium gives a reddish-brown incrustation, which is removed without leaving a gleam by heating in the reducing flame; silver gives white metallic globules and a dark-red incrustation. [Please select]
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Now a well-made pastil should not develope any odor of its own, but simply volatilize that fragrant matter, whatever it be, used in its manufacture. [Please select]
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Finley: The asphalt used must be of the best grade, free from coal tar or any of its products, and must not volatilize more than 0. [Please select]
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By the second sublimation the whole of the benzoic acid is not volatilized. [Please select]
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The volatilized zinc rises to the upper part of the furnace, where the heat is often insufficient to retain it in the state of vapour, and is then deposited on the sides. [Please select]
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The use of charcoal in a pastil is merely for burning, producing, during its combustion, the heat required to quickly volatilize the perfuming material with which it is surrounded. [Please select]
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