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5. On some Derivatives from the Olefines. By Frederick 
Guthrie, Professor of Chemistry and Physics in the Royal 
College, Mauritius. 
This paper is supplementary to, and forms the sequel of, a series 
of papers which have been published in the “ Quarterly Journal of 
the Chemical Society of London.” 
In continuing; the examination of the behaviour of the olefines 
towards compound halogens, certain compounds previously described 
have been submitted to a test of homogeneity, of which the following 
is the principle : — 
“ If a body be partly dissolved in a solvent, and if the dissolved 
part and the undissolved part, or the dissolved part and the whole, or 
the undissolved part and the whole, have the same composition, then 
the body is a simple one.” 
Examined in this manner with regard to the solvent alcohol, the 
bisulphochlorides of ethylen and amylen were shown to be true 
chemical compounds. 
The bisulphochloride of ethylen was submitted to the action of 
chlorine, whereupon a body was formed identical with that got by 
the action of chlorine upon the bisulphochloride of chlorethylen or 
upon the bisulphide of ethyl — namely, the chlorosulphide of bichlor- 
ethylen or sulphide of terchlorethyl 
c 4 h 2 ci 3 s. 
Further, the same body C 4 H 4 S 2 Cl was submitted, in alcoholic 
solution, to the action of hydrate of potash, which converted it into 
c 4 h 4 s 2 oho. 
Again, the body C 10 H 10 S 2 Cl (whose equivalent of chlorine has 
been shown to be replacible by 0 and by OHO), on treatment with 
cyanide and sulphocyanide of potassium in alcoholic solution, ex- 
changes its chlorine for cyanogen or sulphocyanogen respectively, 
giving rise to 
Bithiocyanide of amylen, C 10 H 10 S 2 Cy 
and Bithiosulphocyanide of amylen, C 10 H 10 S 2 S 2 Cy 
respectively. 
From these and analogous reactions previously described, the 
conclusion is drawn that the bodies C 4 H 4 S 2 Cl and C 10 H 10 S 8 Cl 
