892. J. M. Crafts on the Product of the Reaction between 
Of the different portions of the amorphous body whose analy- 
ses are given below, the melting points of Nos. I]. and III. were 
near 145° C.; but as the substance first softened and then became 
partly liquid before it melted entirely, this point could not be 
very accurately determined. The melting point of No. V, which 
was more precisely marked, was about 125° C, 
The substance was prepared for analysis by washing carefully 
with warm water and drying at 60°-70°C. Some portions were 
also washed with alcohol to insure that no bromid of ethylene 
Temained attached to them, but this precaution was found 
unnecessary. 
Analyses made of different preparations gave the following 
ults : 
I II, It, It, Iv. IV, 
C 36°81 34:96 34:27 2oy 34:20 34°49 
H 5°86 549 5°78 Cs aa ‘93 5 
S 4494 45°98 42°95 43°05 42°05 42°12 
Br 12°56 13°76 17-49 saws S (by loss) 18:00 
10017 10019 10049 
In order to determine in what degree the relative proportions 
of the bodies entering into the reaction might influence the com 
pevigen of the product, in one experiment (No. V) 1 part 
romid of ethylene was treated with 4 part monosulphid of i 
tassium in alcoholic solution (= 1} equivalents); in another (VJ) 
‘sulphid of potassium (7 equivalents) and the mixture was 
allowed to stand 48 hours after the formation of the precipitate. 
A determination of bromine gave: 
v. VI. 
Br = 27°91 &c. 11°95 
ethylene, C,H,S; but is a body whose composition varies be 
in the different preparations, and which contains a considerab! 
amount of bromine, even though the quantity of monosulphid 
potassium employed may have been largely in excess. The 
question arises, is there any relation between the percentage 
amounts of the constituents of this body which is constant 12 
all the analyses, and which may give a clue to determine its com 
Position ? : pe 
An inspection of the figures given above shows that in all the 
talyses the percentage of C is to that of H as 6:1, the same 
ratio that the percentages of those elements bear to one another 
in ethylene, so that it would appear that this radical remains 
