Abstract
LONDON Royal Society, June 23.R. Whiddington and J. E. Taylor: The photographic action of slow electrons. The photographic action of electrons (60-300 volts) has been experimentally investigated in the case of ‘Imperial Duoplex’ films. The formula connecting the blackening with the electron current producing it is of the same form as that known to hold in the case of light but with the constants appropriately changed. The ‘inertia’ of the film is considerably reduced by oiling its surface before exposure, almost certainly due to fluorescence of the oil under electron impact. A. Egerton and G. S. Callendar: The saturation pressures of steam (170° to 374° C). The saturation pressures of steam up to the critical point have been measured by a dynamic method using the apparatus designed by the late Prof. H. L. Callendar for the determination of the total heat of steam. The probable accuracy of the results is 1 in 6000. Previous results by statical methods had agreed satisfactorily to 270° C, but departed considerably from each other above that temperature. The present results lie in the region between the former determinations, and should help in the establishment of a precise knowledge of the thermal properties of steam.
Article PDF
Rights and permissions
About this article
Cite this article
Societies and Academies. Nature 130, 34–36 (1932). https://doi.org/10.1038/130034a0
Issue Date:
DOI: https://doi.org/10.1038/130034a0