Abstract
Aldehyde-fuchsin has been obtained in a precipitated form by adding paraldehyde into acidified aqueous solution of basic fuchsin. Alcoholic solution of this aldehyde-fuchsin precipitate shows a stainability very similar to that of Gomori's aldehyde-fuchsin mixture. Specific stainability for pituitary basophils, pancreatic beta cells and neurosecretory substances is retained about two weeks after preparation. As the time for the preparation is also markedly reduced, it has been made possible to carry out the preparation of aldehyde-fuchsin and the staining procedure within several hours.
