On the Action of the Latex of Euphorbia peplus on a Photographic Plate

Abstract

IN August, 1909, our attention was directed to certain properties of surgical importance possessed by the milky juice of Euphorbia peplus, a spurge naturalised in this colony. During the examination of the milky juice or latex, we exposed during two days in the dark a highly sensitive photographic plate some millimetres above a sheet of glass on which we had dried a few drops of the juice. On development, a sharp image of the dried juice appeared on the plate. We propose to describe briefly a few results from the many experiments since made to determine the conditions and nature of the action on the photographic plate.