0.0 .o .o .o .o .03 . 19 1.04 0.19 ... Since we know accurately the melting points of the normal mercaptans we have a method to test ... 1.5 120 150 180 210 240 270 Temperature of melting, OK. Fig. ;3.-Normal mercaptans, Austin method. ... Summary 1. A modification of the melting point ap- paratus of Andrews and co-workers is given. 2. The melting temperatures of a series of normal mercaptans are reported. 3. The relation of the melting temperature to ...