222 PEOCEEDINGS OF THE AMERICAN ACADEMY 



and one lighter than water, the latter in somewhat smaller quantity 

 than the former. The addition product from the fraction 80 — 90° 

 possessed the characteristic odor of the substituted paratfine hydro- 

 carbons, and upon analysis it gave a percentage of bromine corre- 

 sponding to monobroraheptylen. 



0.1850 gr. of the substance gave 0.1116 gr. AgBr. 



Calculated for CtEi^Bt. Found. 



Br 46.93 46.57 



With bromine this product united with a violent reaction, and the 

 resulting oil gave a percentage of bromine required for dibrom- 

 heptylen. 



0.1938 gr. of the substance gave 0.2797 gr. AgBr. 



Calculated for CjHi^Brj. Found. 



Br 62.01 61.42 



This fraction therefore consists principally of a heptylen, and it is 

 probably identical with the heptylen obtained by Pelletier and Wal- 

 thier from the coal oil of Amiano.* 



Upon the addition of alcoholic mercuric chloride to fraction 110 — 

 125° atmospheric pressure, a finely crystalline precipitate was formed 

 that contained a percentage of mercury required for methyl sulphide. 



0.3156 gr. of the mercury compound gave 0.2214 gr. HgS. 



Calculated for (CHj^oSHgClj. Found. 



Hg 60.06 60.47 



The fraction 125—135° also gave a crystalline precipitate with 

 alcoholic mercuric chloride, which after crystallization from benzol 

 gave a percentage of mercury corresponding to ethyl sulphide. 



0.5056 gr. of the mercury compound gave 0.3122 gr. HgS. 



Required for (CjHBljSHgCl,. Found. 



Hg 55.40 55.42 



Although the boiling points of the oils from which these mercury 

 addition products were separated were considerably higher than those 

 of the sulphides to which the mercury determinations correspond, 

 these oils consisted to a certain extent of hydrocarbons which were 

 subsequently found to contain no sulphur. The higher fractions 

 gave with mercuric chloride oily addition products which became 



* Berz. Jahresb., xxi. 470. 



