A VALUABLE and interesting contribution to the study of the formation of carbohydrates in the foliage leaf is contained in a paper, by Mr. John Parkin, published in The Biochemical Journal (vol. vi., part i.). In order to simplify the case as much as possible and to reduce the conflicting factors to a minimum, the snowdrop (Galanthus nivalis, L.) was chosen as the plant to be investigated, as in a previous research the author had shown that in no case is starch or inulin to be detected in the mesophyll of the leaf. It was therefore probable that maltose would be absent in the leaf also, and the research would be thus narrowed down to studying the relationship between cane sugar, dextrose, and lævulose under different conditions. The object aimed at in the beginning was to test Brown and Morris's view, enunciated in 1893, that cane sugar is the first product of carbon-assimilation in plants.