The nature of the unsaponifiable fraction of the lipoid matter extracted from green leaves

IN an investigation now being carried out by E. M. Hume at the Lister Institute, the unsaponifiable matter of the lipoid substances extracted from spinach leaves was being prepared by her to supply the vitamin A in a certain diet. During the course of this preparation we noticed that a white crystalline substance readily separated when this unsaponifiable matter was being taken up with hot alcohol, and we therefore decided to investigate its nature.