100 JOURNAL OF THE 



caution, so as to avoid the troublesome explosions. To make 

 the absorption as regular as possible the position of the tubes 

 with reference to the generating flask was regularly changed. 

 The absorption was rapid, the heptylen going through various 

 changes of color from yellow to deep orange-brown. When the 

 deeper color was reached, the tubes were disconnected from the 

 generating flask and placed in direct sunlight until the orange- 

 color was lost. If taken from the ice-water the heptylen became 

 very warm and a rapid evolution of gas took place. It was 

 much the best, and tended to prevent a complication of reactions, 

 to keep the tubes all the time at a low temperature and to shade 

 them well from sunlight during the passage of the gas. After 

 some days the absorption took place more slowly and an exposure 

 of many hours was needed for decolorization. Even with great 

 care explosions would take place after the heptylen was largely 

 saturated with the gas, and about half of the heptylen was thus 

 lost. It was necessary then to stop before complete saturation or 

 a permanent coloration w^as reached. The oily liquid was thor- 

 oughly washed with water until the washings no longer had an 

 acid reaction. This wash-water acquired a pungent irritating 

 odor. The remaining oil w^as dried over calcium chloride. 



Aqueous Solution. — On examining first the water used in 

 washing, it was found strongly acid, still but little of the original 

 liquid seemed to have gone into solution. A portion of the 

 water was placed over sulphuric acid and on evaporation left a 

 small residue, white, deliquescent and somewhat oily. The main 

 part was apparently crystallized, contained chlorine and had the 

 smell of acetic acid and its chlorine derivatives. The amount 

 obtained was too small for purification or further attempts at 

 identification. The remainder of the solution was neutralized 

 with barium carbonate, changing from a clear liquid to a rosy flesh- 

 color, with the same fruity, pungent, irritating odor. This was 

 filtered and, after evaporating to a small bulk, the barium precipi- 

 tated by sulphuric acid. After filtering again, it was distilled. 

 Three fractions were taken. The first under 100° gave no test 

 for chlorine. The second, 100 — 101 ° contained chlorine. The 



