Show sees kinship between vitamins and vision the manner in eiph which the eye works arks particularly how it perceives what one knows as color is a very considerable mystery the puzzle Is 15 not very much cl dinned trifled but Is pos sibly made more interesting by ohp recent discovery that there Is a close relation between vitamin A and the of visual purple in the retino it has long been I 1 noan that visual purple which an important part in the functioning of the retinal rods Is sensitive to light bleaching to a colorless material miter lal when exposed to illumination watching this phenor nei on dr george dnald ald at the Oceano grap lie ile institute woods hole mass dis covered that when the urple be comes transparent a tay yellow material Is split off from it ihil material a hitherto lit 1 herto unknown chem leal ica was found to be closely related to carotene which in turn Is a close au relative of vitamin A doctor wald then actually wit hessed the transformation of the new t ye yellow flow substance sub lato vitamin A literary digest s |