A text-book on chemistry : for the use of schools and colleges . ature of the oxide bythe flame of a spirit lamp, it is resolved into metallic mer-cury and oxygen gas ; the former distills into the receiver b,and the latter collects in the inverted jar of the trough. Another process is to place the peroxide of manganese(Mn. 02) in an iron bottle, from which a tube, b, Fig. 149,projects; this tube may be connected with another,^ bymeans of a cork and an India-rubber tube, e. The bot-tle is to be arranged in a small furnace, and made red hot;the manganese loses one third of its oxygen, which may
A text-book on chemistry : for the use of schools and colleges . ature of the oxide bythe flame of a spirit lamp, it is resolved into metallic mer-cury and oxygen gas ; the former distills into the receiver b,and the latter collects in the inverted jar of the trough. Another process is to place the peroxide of manganese(Mn. 02) in an iron bottle, from which a tube, b, Fig. 149,projects; this tube may be connected with another,^ bymeans of a cork and an India-rubber tube, e. The bot-tle is to be arranged in a small furnace, and made red hot;the manganese loses one third of its oxygen, which maybe collected in a gas-holder, as shown in the figure. The most convenient mode of preparing it is to place ina flask, a, Fig. 150, a mixture of chlorate of potash andperoxide of manganese ; to the mouth of the flask a tube,b, is adapted by means of a tight cork, the lower end of the In what bodies does oxygen occur ? Describe its preparation from of mercury, from peroxide of manganese, and from chlorate of potash. PREPARATION OF OXYGEN. 171 Fig.
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