_19 November._ The mixture, which had been applied to a smooth spot of
skin on the forearm, was removed with a 2 percent solution of
copper-sulphate. There appeared a blackish-brownish, strongly viscous
mass with a metallic sheen which, when rubbed off, spread over the
entire experimentation area. After an initial formation of black smoke
(phosphorus fumes) and a strong glow, the phosphorescence, because of
the formation of a copper-phosphate coating, ceased almost immediately.
It seems to be possible that phosphorus, if it comes in contact with
small skin wounds, is assimilated into the body by resorption. This spot
of skin likewise showed an increase in temperature until 14 December.