XXII. On comparative vegetable Chromatology

Abstract

The study of colouring-matters as described in the following paper requires the use of a somewhat special kind of chemistry and of spectroscopic instruments designed for the purpose, but yet it cannot be looked upon as being either chemistry or spectrum-analysis. It is also requisite to make use of light as a reagent, and yet the subject could not be called photography or even photo-chemistry; and though most intimately connected with biology, it could scarcely be regarded as a branch of that science. It appears to me most desirable to adopt some name for the whole subject, including whatever modifications of other branches of science are requisite for its efficient study, and none would meet the requirements of the case better than Chromatology .