[The cytobacteriological coloring substance BF (methylene blue and basic fuchsin)].

The Authors have set up a cytobacteriological colouring matter for the reading of the figured elements of liquor, urine, exudats, and trasudats. The colouring solution is steady, it colours and fixes at the same time and is composed by blue methylene and basic fuchsine. There is abready a combination of both colouring matters in WAYSON'S formula for the bipolar colouring matter of the Pasteurella pestis and in PICK'S and Jacobson's formula to point out the intercellular neisserie.