10 
in the same way as diamylene is formed by treating amy- 
lene with sulphuric acid. In order to test this theory I 
have made some experiments with the two isomers C 6 H 10 , 
viz., diallyl and liexoylene. By acting with sulphuric acid on 
these compounds, I obtained, besides large quantities of 
tarry matter, polymeric modifications boiling above 200°, 
having a smell similar to the hydrocarbons described above, 
giving also similar nitro-compounds ; but the quantities 
which I got were not large enough for a more exact exami- 
nation.” With a view to throwing light upon this point, 
at the request of Mr. Schorlemmer I undertook to investi- 
gate the action of sulphuric acid on diallyl. The diallyl 
used was obtained by the action of sodium upon allyl iodide 
and boiled at 59°. Since concentrated sulphuric acid acts 
with great violence upon diallyl, the latter was diluted with 
about an equal bulk of pure paraffins boiling at from 55 ° to 
60°. To this mixture sulphuric acid was gradually added 
in small quantities, the bottle being frequently shaken. At 
the end of the reaction the contents of the bottle were found 
to be arranged in two layers, of which the upper one con- 
sisted of unaltered paraffins, and the whole of the diallyl 
having been taken up by the acid. The heavier and acid 
portion was diluted with water, when a dark coloured oil 
lighter than water separated out, and the whole was dis- 
tilled from a large flask. The distillate consisted of a light 
oil, which came over below 100°, mixed with a little water. 
After a second solution in sulphuric acid and a repetition of 
the foregoing processes, in order to remove all traces of the 
paraffins, the oil was dried over calcium chloride and heated 
for some hours over potassium. The oil was thus obtained 
pure and boiled constantly at 93°. Analysis showed that 
its composition is expressed by the formula C 6 H 12 0. 
This substance is readily soluble in concentrated sulphuric 
and fuming hydriodic acids, and slightly so in water. It is 
unacted upon by either caustic potash or potassium, and 
