1. Curves have been prepared which show the quantitative absorption spectra of the methane, colored carbinol and fuchsone of each of the following compounds: 3-chloro-4- hydroxytriphenylcarbinol, 3-bromo-4-hydroxy-triphenylcarbinol, 3, 5-dichloro-4- hydroxytriphenylcarbinol and 3, 5-di-bromo-4-hydroxytriphenylcarbinol together with the curves for the colorless carbinols of the last three compounds. Symmetrical or ...