crith

[Gr. krithe =barley, a barleycorn.] A term introduced by Hoffmann, and signifying 0.0896 grammes-the weight of a liter of hydrogen at 0 Centigrade, and under a barometric pre ure of 0.76 meters. "The weight of 1 liter of hydrogen being called 1 crith , the volume-weight of other gases, referred to hydrogen as a standard, may be expre ed in terms of this unit. For example, the relative volume-weight of chlorine being 35-5, that of oxygen 16, that of nitrogen 14, the actual weights of 1 liter of each of these elementary gases at 0°C. and 0.76 m. m. pre ure, may be called respectively 35-5 criths , 16 criths , and 14 criths . So, again, with reference to compound gases, the relative volume-weight of each is equal to half the weight of its product-volume. Hydrochloric acid, for example, consists of 1 volume of hydrogen and 1 volume of chlorine=2 volumes; or by weight 1-35-5-36-5 units, whence it follows that the relative volume weight of hydrochloric acid gas is 365+2= 18-25 units, which last figure, therefore, expre es the number of criths which 1 liter of hydrochloric acid gas weighs at 0°C. temperature and 0-76 meters pre ure, and the crith being 00896 grammes, we have 18-25×0-0896= 1-6352, as the actual weight in grammes of a liter of hydrochloric acid gas. liter weight, or crith , 0-0896 grammes employed as a common multiple, the actual or concrete weight of 1 liter of any gas, simple or compound, at standard temperature and pre ure, may be deduced from the mere abstract figure expre ing its volume-weight relatively to hydrogen." -Hofmann: Modern Chemistry, pp. 131, 132. Thus by aid of the hydrogen