Acetylene
a hydrocarbon having roform, which is obtained from it by distillation with bleaching-powder. It is carbon atoms are united to each other by three bonds. It is produced by passing an electric current between carbon poles in an atmosphere of hydrogen, and also by the incomplete combustion of hydrocarbons. It is a colorless gas, specific gravity, 0.92, has a peculiar odor, and burns with a bright flame; it forms ing an electric current between carbon prous chloride, which, by the action of hydrocarbons. It is a colorless gas, spelene, C2H4. cific gravity, 0.92, has a peculiar odor, gas formed by the action of water on prous chloride, which, by the action of nascent hydrogen, is converted into ethy- 3-Vol. I-Cyc cartridges filled with calcium carbide are able valve. The acetylene flame is very used, and the dropping of the water into brilliant. the cartridge is regulated by an adjust-