Elements of chemistry : including the applications of the science in the arts . Fig. 232 HYDROGEN. required, as iu this application of it, the gas may be obtained by beating oxide ofmanganese in a cylinder of cast iron supported over a furnace, like tbc retort forcoal gas. The calcined oxide does not regain its oxygen wben afterwards exposed tothe air, as was once supposed, but would still be of some value in the preparationof chlorine. Ozone. — When electric sparks are taken through perfectly dry oxygen, a smallportion of the gas acquires new properties, according to A. de la Rive, and
Elements of chemistry : including the applications of the science in the arts . Fig. 232 HYDROGEN. required, as iu this application of it, the gas may be obtained by beating oxide ofmanganese in a cylinder of cast iron supported over a furnace, like tbc retort forcoal gas. The calcined oxide does not regain its oxygen wben afterwards exposed tothe air, as was once supposed, but would still be of some value in the preparationof chlorine. Ozone. — When electric sparks are taken through perfectly dry oxygen, a smallportion of the gas acquires new properties, according to A. de la Rive, and is by Berzelius to pass into an allatropic condition, in which it is named ozonefrom the peculiar odour it possesses, and which is somewhat metallic in oxygen evolved from the decomposition of water in the voltameter (page 221)has the same odour. But the most ready mode of producing it is to place a fewsticks of phosphorus in a quart bottle containing a little water at the bottom of the sticks of phosphorus undergo the low combustion and are luminous,
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