ON SOME DERIVATIVES FROM THE OLEFINES. 631 
with zinc, place beyond doubt the possibility of the construction of various other 
compounds of the higher alcohol radicals from compounds of the lower ones. 
From the bisulphochloride of ethylen on the one hand, and zinc-methyl and 
zinc-ethyl on the other, we may confidently expect to obtain the bisulphides of 
all the radicals of the form C,, H,,4, above the bisulphide of propyl, inclusive: 
while the formation of the corresponding alcohols from the bisulphides of the 
radicals may be a matter of labour, but cannot be one of uncertainty. 
So far my examination of the behaviour of the olefines to compound chemico- 
negative groups has led to the formation of the following bodies :— 
From Ethylen, ©, Hy. 
S, Cl Bisulphochloride of ethylen. 
S, Cl, Bichlorosulphide of ethylen. 
S Cl, Chlorosulphide of bichlorethylen. 
4H, S Cl, Sulphide of terchlorethyl. 
H, 8, OHO, Hydrated bisulphoxide of ethylen. 
From Amylen C,) H,). 
S, Cl Bisulphochloride of amylen. 
S, Cl, Bichlorosulphide of amylen. 
S Cl, Chlorosulphide of terchloramylen. 
Ss 
Ss 
a A 
i 
4 
eeaa 
oo Oo 
i 
f=} 
O Bisulphoxide of amylen. 
» 52 OHO Hydrated bisulphoxide of amylen. 
S, Bisulphide of fusyl. 
S, Bisulphide of amylen. 
Cl, Bichloride of amylen. 
8 
bot fot bE bt lo 
~ 
So 
Cy, 5HO Penthydrated bicyanide of amylen. 
Cy Bithiocyanide of amylen. 
Cy S, Bithiasulphocyanide of amylen. 
NO,) Binitroxide of amylen. 
C, H, Bisulphide of cenanthyl. 
ee 
oo 
PCV (Sel (ee) 
ee 
oo 
— 
br fr 
aQ 
re 
Mw mM 
ad ~) 
2 
o 
In the foregoing pages, I have been induced to employ some expressions which 
may need a word of explanation. 
The term 7ecomposition has been often used in place of decomposition. When 
the reaction which ensues between bodies is unaccompanied by the destruction 
of their form or type, the change may be more fitly called a recomposition than a 
decomposition. The latter word is suggestive of a degeneration, which the former 
word avoids, and the idea of which is in such cases out of place. Recomposition 
corresponds more nearly to the happier German term “ Umsetzung,” as dis- 
tinguished from “ Zersetzung.” 
Isotype, idiotype, isotypic, idiotypic. A body is anisotype of another, or isotypic 
with it, when the two are built on similar types. Thus, the fatty acids are iso- 
types. Idiotypic are bodies which are built on the same type. Thus all elemen- 
tary replacement derivatives of a body are its idiotypes, or are idiotypic with it. 
VOL. XXII. PART III. 8A 
