through it on receiving definite assurance from King George V. (cf. Theodore Champion, Jiistorical and Descriptive Catalogue of Alchemical MSS(1926, etc.); (c) Dictionary of Explosives (1920); R. W. Trul- linger, Amer. Soc. C. E., vol. 21.4 (1921-2). 194 surface, with mass concrete superstructure wall (fig. 2). This loss of infectivity and of