Abstract
Summary
Acid and alkali behave oppositely as far as their extracting power towards an acid and an alkaline dye is concerned. Addition of NaCl inhibits the extracting power of stronger concentrations of acid and in certain cases also that of alkali towards neutral red. Neutral NaCl solutions on the other hand extract neutral red better than water. How far in these effects the dissociation depressing action of NaCl or other actions of NaCl are concerned is uncertain. These experiments demonstrate that there exists a certain similarity between the action of acid and alkali on amcebocytes on the one hand, and on filter paper on the other hand; but this simlarity is incomplete. It therefore appears probable that the conditions determining the staining of cell granules by neutral red differ in some essential respects from those determining the staining of filter paper.
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