DURING the ten years 1886-96, the late Prof. H.E Armstrong and Prof. W. P. Wynne were engaged, at the Central Technical College, London, in a series of researches which served to establish on a ...

THE rates of evaporation, into a vacuum, of solid naphthalene from different crystal faces have been measured directly. Two crystals of naphthalene, masked so as to leave exposed only portions of ...