_19 November._ The mixture was dropped on a smooth spot of skin on the
forearm and immediately thereafter wiped off with a tampon dipped in R
17. R 17 quickly dissolved the phosphorus and the caoutchouc. Subsequent
checks showed a complete cessation of phosphorescence. The spot of skin
showed an increased temperature until 14 December, as the testers
ascertained by placing the backs of their hands against it.