618 PROFESSOR FREDERICK GUTHRIE 
C, H, Cl+ Ag 0 C,) H,, Ol+Ag 0 
=C, H, 0+Ag Cl =C,, H,,0+Ag Cl 
C, H; Cl+KOHO C,, H,, Cl+KOHO 
=KCl+0,H,0HO =KCI+C,,H,, OHO 
C,H, S, Cl+Pb 0 C,) H,, 8. Cl+ PbO 
=C,H,S,0+PbCl =C,,H,, 8, 0+Pb Cl 
C,H, S,Cl+KOHO C,, H,, S, Cl+KOHO 
=C, H, §, OHO+K Cl =C,, H,, 8, OHO+K Cl. 
Viewed from this aspect, the bisulphochlorides of ethylen and amylen are the 
chlorides of sulphur-bearing radicals,— 
H, gy co a1, 
C, S, 10 §, 
which may indeed be isotypic with the chlorides of ethyl and amyl; but if they 
are so, they indicate that 32 of sulphur may replace 1 of hydrogen. Certainly 
the sulphur is combined with great energy, as we have seen formerly in the pre- 
paration of sulphide of fusy]l, 
Cio H, 8, 
and the numerous other reactions. Further instances of this are furnished by 
Bithiocyanide of amylen, C,, H,, Gn and Bithiosulphocyanide of amylen, C,, H,, 
S. 
S, Cy. 
The formation of these substances is so akin to the already described forma- 
tion of the oxide and hydrated oxide of bisulphide of amylen, that a detailed 
description is superfluous. In both cases, an alcoholic solution of the bisulpho- 
chloride of amylen is heated on a water bath with an alcoholic solution of the 
cyanide or sulphocyanide of potassium. ‘The precipitated chloride of potassium is 
separated by filtration, the excess of alcohol expelled on a water bath, and the 
resulting product washed with water and dried 77 vacuo. 
The bithiocyanide of amylen showed the following percentage composition on 
analysis :— 
I, 0:2432 grms, gave 55°65 per cent. carbon and 7:60 hydrogen. 
II. 0°3881 grms. gave 24°66 per cent. sulphur. 
Ciqeln, = Pound, 
requires I. II. 
C=56:25 55:65 . 
Belay cist 7°60 she 
S=25:00 Bae 24°66 
N=10:94 ate ate 

100-00 
The bithiocyanide of amylen has the specific gravity 1:07 at 13°C. It appears 
as a yellow liquid of nauseous smell. 
The bithiosulphocyanide of amylen gaye, on analysis, 
