ON SOME DERIVATIVES FROM THE OLEFINES. 617 
showing that either the olefines have more than one index of saturation, or that 
the diverse grouping of the halogen equivalents must compensate for the absolute 
number of their equivalents concerned. 
The general direction of argument then, hitherto, tends to show that towards 
chlorine, the bisulphochlorides of ethylen and of amylen behave like the sulphides of 
chlorine-containing radicals. 
Other reactions show these bodies in a different perspective. 
The Hydrated Bisulphoxide of Ethylen. 
C, H, 8, OHO. 
If an alcoholic solution of hydrated potash be added to an alcoholic solution 
of the bisulphochloride of ethylen, an immediate precipitation of the chloride of 
potassium ensues—a precipitation which removes the whole of the chlorine, 
provided the first solution bein excess. The alcoholic filtrate from the precipitated 
chloride of potassium is then freed from the excess of alcohol by the gentle heat 
of a water bath, and the heavy oily drops which appear are washed with water, 
to remove the still adhering alcohol and chloride of potassium, and then dried zn 
vacuo over sulphuric acid. 
On analysis— 
I. 0:4333 grms. gave 31°33 per cent. carbon, and 6°67 hydrogen. 
II. 0:2984 grms. gave 42°26 per cent. sulphur. 
C, H, 8, OHO 
Requires I. II. 
C=31-17 31°33 ; 
H= 6:49 6:67 sae 
S=41:56 nee 42:26 
0 =20-78 Ss uf 

100-00 
Hence, the body formed is the hydrate of the bisulphoxide of ethylen, its for- 
mation having taken place according to the equation, 
C, H, S, Cl+KOHO=K C1+C, H, 8, OHO, 
a reaction precisely similar to that which directs the formation of the hydrate of 
the bisulphoxide of amylen. Of course both of these reactions may be viewed as 
consisting in the replacement of the chlorine by peroxide of hydrogen. 
I must leave the further description of this body, and of the bisulphoxide of 
ethylen C, H, 8, O, and of some other derivatives from the bisulphochloride of 
ethylen, for another opportunity—merely insisting here upon the curious fact, 
that towards oxides and hydrated oxides, the bisulphochlorides of amylen and ethylen 
behave like the chlorides of radicals of the form C, Has 
