146 PROCEEDINGS OF THE AMERICAN ACADEMY. 



quantity of the barium salt crystallizing in needles was obtained, and the 

 percentage of barium found, 25.95, agreed closely with the theoretical 

 percentage of barium in barium mesitylene sulphonate (C9HiiS03)2Ba, 

 25.61. But the salt proved to be anhydrous, while according to Jacob- 

 sou,* barium mesitylene sulphonate crystallizes with 9 HgO. On account 

 of the limited supply of the barium salt, it was not possible to verify this 

 determination by further study ; but there can be no doubt of the possi- 

 bility of forming a barium salt of mesitylene sulphonic acid in this man- 

 ner, since trinitromesitylene melting at 225°-230°, melting point of 

 trinitro mesitylene, 230°, was formed without difficulty by the action 

 of fuming nitric acid on this distillate. 



As further evidence of the composition of the hydrocarbon 163° Ohio 

 petroleum, 46 grams well purified with fuming sulphuric acid was ex- 

 posed to the action of chlorine until the weight had increased 11 grams. 

 The chlorinated product was fractioned twelve times under 80 mm., when 

 15 c.c. collected at 130°-135°, distilling at 200°-208° atmospheric pres- 

 sure. It was shown by analysis to have the composition required for 

 CioH.2iCl. 



I. 0.2340 gram of the substance gave 0.1934 gram AgCI. 

 II. 0.1935 gram of the substance gave 0.4785 gram CO2, and 0.2119 

 gram HgO. 

 III. 0.1715 gram of the oil gave 0.4246 gram COg, and 0. 1963 gram HjO. 



20.45 



In a determination of its specific gravity at 20°, this chlordecane gave 

 0.8958. In continuing the distillation of the chlorine product after the 

 twelfth fraction, 10 c.c. collected at 160°-170°, specific gravity. 1.0627 

 at 20°, which gave the percentages of carbon, hydrogen, and chlorine re- 

 quired for CioHoqCL. 



I. 0.2984 gram of the substance gave 0.4105 gram AgCl. 

 II. 0. 2753 gram of the substance gave 0.5746 gram COo, and 0.2356 

 gram 11,0. 



Found. 



II. 



56.94 

 9.51 



34.03 



* Ann. Cliem. Pharm., XLVI. 95. 



