612 PROFESSOR FREDERICK GUTHRIE 
The question, which has been already partly discussed,* and the continued dis- 
cussion of which forms the subject of the present communication, is, whether ole- 
fines of the form 
Con Hon 
may not, like naphthaline, unite with groups consisting of dissimilar halogen 
elements: and amongst what class of organic salts such combinations are to be 
ranked. 
Since with such olefines there appears to be only one stage of saturation, we 
are induced to examine the behaviour of the compound halogens already formed 
towards the olefines, rather than to effect the same purpose by the successive 
application of dissimilar ones. 
The olefines whose behaviour in this direction I have as yet chiefly examined 
are Ethylen or Olefiant gas, and Amylen. These olefines have been principally 
considered in their relation to the sulphides of chlorine. 
The ethylen employed was formed by heating quickly a mixture of three 
parts by volume of oil of vitriol with one part of alcohol of 85°/, and sufficient 
sand to make a thick paste, passing the gas in succession through dilute caustic 
soda and strong sulphuric acid, and collecting over lime water. Ethylen so pre- 
pared, which, before used, is dried by passing through strong sulphuric acid, I 
have analyzed on several occasions, and found absolutely pure. 
The amylen} employed had been prepared by the action of chloride of zinc 
on amylic alcohol. After a few rectifications it boiled constantly at 38° C. at 
758 m.m. pressure. It has the specific gravity of 0°6727 at 12°C. On burning 
with oxide of copper it showed the following composition :— 
I. 0:2346 orm. gave 85°77 per cent. carbon and 14:11 hydrogen. 
II. 0°2627 grm, gave 85°79 per cent. carbon and 14:22 hydrogen. 


Creha Pound, 
requires f. II. Mean. 
Co 807 USOT A. LOO Oret. cy MOOG 
EH 14-290 ee Ie os. 1 22F fs Tae 
100-00 99:94 
The results which I have already obtained in this direction are briefly as 
follows : {— 
* I. Chem. Soc. Quart. Jour., vol. xii. p. 109. Ann. der Ch. u Ph., exiii. p. 266; Annales de 
Ch. et Phys., vol. lix. p. 461. 
II. Chem. Soc. Quart. Jour., vol. xii. p. 35. Ann. der Ch. u Ph., exvi. p. 234. 
III. Chem. Soc. Quart. Jour., vol. xiii. p. 129. 
t From Messrs Simpson, Mavte, and Nicuotson. 
ee Worrz (Ann. de Ch. et Phys., vol, lix.), in referring to the bodies (1), (2), (3), (4), (9), (10), 
remarks,— 
“SCI, correspondant a SO, etant diatomique, il en résulte en effet que SCl,—Cl c’est 4 dire SCl 
doit étre monatomique. Vous ferons remarquer, néanmoins, que l’on peut envisager la constitu- 
tion de ces composées d’une autre maniére, en supposant qu’ils renferment le groupe diatomique, 
“ Sulphure d’ethyléne (C, H, §,)” et 
