A text-book on chemistryFor the use of schools and colleges . sea-weed,but is also found in some saline springs, in certain Mex-ican silver ores. It may be obtained by lixiviating kelp, and evapora-ting till no more crystals are produced. The mother-liquor is then treated with sulphuric acid, and subse-quently heated with peroxide of manganese in a leadenretort, a b c, Fig. 260, the iodine distilling over into thereceivers, d. It is a solid substance, of a bluish-black color, with ametallic lustre, communicates to the skin a fugitive yel-low stain, and smells like a sea-beach. It is very vola-
A text-book on chemistryFor the use of schools and colleges . sea-weed,but is also found in some saline springs, in certain Mex-ican silver ores. It may be obtained by lixiviating kelp, and evapora-ting till no more crystals are produced. The mother-liquor is then treated with sulphuric acid, and subse-quently heated with peroxide of manganese in a leadenretort, a b c, Fig. 260, the iodine distilling over into thereceivers, d. It is a solid substance, of a bluish-black color, with ametallic lustre, communicates to the skin a fugitive yel-low stain, and smells like a sea-beach. It is very vola-tile, producing a pale vapor at 60°, and crystallizes inrhombic plates and octahedra. The specific gravity At 220° it melts, and boils at 350°, giving offviolet fumes. The specific gravity of the vapor is Describe the experiment Fig. 259. What are the preparation andproperties of nitro-mnriatic acid ? From what source is iodine pro-cured ? What is the method of its preparation ? What is its ap-pearance ? PROPERTIES OF 260. 287. o o o o Fig. 261.
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