THE history of a science has often been compared to the erection stone by stone of some great edifice; but it appears to the writer that the metaphor is ill chosen inasmuch as the complete building is already planned when the foundation is laid. A closer analogy is that of a jig-saw puzzle in which the separate, irregular bits are slowly fitted into their several places whilst the ultimate result remains hidden until the whole is complete.
Geschichte der organischen Chemie.
Von Carl Graebe. Erster Band. Pp. x + 406. (Berlin: Julius Springer, 1920.) England, 84 m.; Germany, 28 m.