OF THE DESTEUCTIVE DISTILLATION OF BOGHEAD COAL. 
459 
It is submitted that the foregoing experiments prove that the distillate from the 
Torbane-hill mineral contains, in addition to several other substances, a series of hydro- 
carbons having the per-centage composition, density in the fluid and gaseous states, and 
also the boiling-point of the alcohol radicals. It is perhaps to be regretted that in 
investigating these bodies, we are unable to avail ourselves of active affinities of a kind 
tending to yield easily procured and definite compounds, the study of which would 
remove all doubt as to identity. It is also peculiarly unfortunate that the boiling-points 
of simple and compound radicals, as at present determined, show no fixed law ; in fact, 
if we examine the only data in our possession on the subject, namely, the numbers given 
by WuKTZ, we find no less than nine different values for the increment of as may 
be seen from the following Tables : — 
I. Boiling-point. 
Ethylamyle C“ 88° 
Ethylbutyle 62° 
Difference for 26° 
II. Boiling-point. 
Methylcaproyle C''' H*® 82° 
Ethylbutyle ... 62° 
Difference for 20° 
III. Boiling-point. 
IV. Boiling-point. 
V. Boiling-point. 
Butyle C'® 
106° 
Butyle C'®H'® 
106° 
Butyle C*®H'®... 
106° 
Ethylamyle C“ 
88° 
Ethvlbutyle 
62° 
Methylcaproyle C'^ H'®... 
82° 
Difference for . 
18° 
2) 44° 
Difference for EP 
914° 
Difference for C® 
22° 
VI. 
VII. 
VIII. 
Butylamyle C‘® 
....132° 
Butvlamyle C‘® 
132° 
Butylamyle ... C'®H®®... 
132° 
Butyle C'® H‘® 
....106° 
Ethylamyle C*”* H*'' 
88° 
Methylcaproyle H*'’... 
82° 
Difference for . 
.... 26° 
2) 44° 
2) 50° 
Difference for 
~22° 
Difference for C® 
25° 
IX. 
X. 
XI. 
Amyle C“ 
....168° 
Butylcaproyle C®“ ... 
155° 
Butylcaproyle 
155° 
Butylamyle C'® 
....132° 
Butylamyle... C*® ... 
132° 
Butyle G®H’®.... 
106° 
Difference for C® H® . 
26° 
Difference for C® 
23° 
2) 49° 
Difference for C® 
24°-5 
XII. 
XIII. 
XIV. 
Amyle 
....158° 
Caproyle H®® .. 
....202° 
Caproyle 0®“ H®® 
202° 
Butyle G®H'® 
....106° 
Butylcaproyle .. 
...155° 
Amyle... C‘® 
158° 
2) 52° 
2) 47° 
2) 44° 
Difference for C® . 
.... 26° 
Difference for C® 
... 23°*5 
Difference for C* 
22° 
The following nine values are therefore obtained as the differences for C^H^; the 
Roman numerals indicate the number of the Table : — 
III. II. IV., VII. and XIV. X. XIII. V. XI. VIII. I., VI., IX. and XII. 
18° 20° ' 22° ' 23° 23°-5 24° 24°-5 25° ' 26° " 
Several curious facts become apparent from inspection of these numbers, not the least 
3o2 
