... the majority of the granules. Ehrlich was able by the aid of this dye to demonstrate granules, even in some vegetable cells. Moreover the method of using it is the simplest conceivable, as subcutaneous or intravenous injection, or even feeding, in the higher animals stains the granules; with frog's larvae and invertebrates, to allow them to swim in a dilute solution of the dye is often sufficient. The staining also succeeds in "surviving" ... — Histology of the Blood - Normal and Pathological • Paul Ehrlich
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