616 PROFESSOR FREDERICK GUTHRIE 
Showing that the product, as in the two other cases, is the chlorosulphide of 
bichlorethylen. 
Hence we are led to the general conclusion that, towards chlorine a body of the 
form C, H, 8, Cl behaves like one of the form C, Ha,, S,. For the three bodies 
C, H, 8, Cl, C, H, §,, and C, H, S, Cl, all yield, when acted upon by chlorine, 
C,H,SCl,. Accordingly, the most rational formule for these three bodies 
towards chlorine will be— 
Bisulphide of ethyl. Bisulphochloride of Bisulphochloride of 
ethylen. chlorethylen. 
Con Se, Coy Se, C.qy So 
H Cl Cl 
—the ultimate action of chlorine (at 100°C. in the dark and at ordinary pres- 
sures) being in all cases to form the body, 
H 
C cl g { The chlorosulphide of bichlorethylen, 
4C] or sulphide of terchlorethyl. 
Cl 
I shall not assert that the identity of the ultimate products is a decisive proof, 
even in this case, of the identity of original constitution ; but if it be admitted as 
such, the union of the olefines with the bisulphide of chlorine must be placed side 
by side with the union of hydrobromic acid with ethylen; namely, we must look 
upon the resulting products in the first case as being the bisulphides of the mono- 
chlorinated radicals. 
Further, if we indulge in the assumption that the bichlorosulphides of ethylen 
and amylen, 
©, H,'3,1,, C, A, 8, C1, 
Oe 
are constructed upon the same type, we are induced to the formule, 
C, ct Sau fest } S, Cl, 
which would in truth compel the admission, that S,Cl may saturate a single 
hydrogenoid. This proposal will startle us the less when we remember on the 
one hand the equality in saturating power between chlorine and cyanogen; and, 
on the other, the monosaturating power of sulphocyanogen.* We shall hereafter 
see that the olefines may unite with the elements of one equivalent of sulphocy- 
anogen, and with compound groups of which such an equivalent forms a part, 
* I may not here discuss the composition of the sulphocyanides. Whether they be isotypic with 
the cyanates or the cyanides, or whether such a distinction be at all a substantial one, is here a 
matter of secondary importance. 
