C. M. Warren on the Volatile Hydrocarbons. 
far from being the case; and that the theory of Gerhardt, as 
well as those of Schroder and Léwig, so far as these relate to the 
387 
hydrocarbons, y no means legitimately drawn from nature, 
but is Sidicathax aeebeat 
2p Sertes.* 
¥ Calculated boiling- | Difference betwee 
n d 3 
Formula. (1) Belling soit point a i s os pete deter 
o °o ° 
CoH, 8-9 8 16°5 
Oy 5843 37-0 12°5 24:5 
: es oe 68°5 33-0 35°5 
es its 98-1 53°5 44°6 
2 ic Cig ys 127-6 74-0 53°6 
e 
: ; 3p Series. 
pe D P Calculated boiling- | Difference between 
PS Formula. termined point re cactartey calculated and deter- 
boiling-point. wined boiling-point. 
C2 oH a5 174.9 134-0 44-9 
: Cr 2Hos 195°8 150°5 45°3 
Py 216-2 171-0 45°2 
2. Hydrocarbons from Coal-tar Naphiha. 
a es Hiernined Calculated boiling- ee rip —— 
nee Formula. boiling: point. point = desig s ated boiling pol foot 
r oO o °o 
| Benzole, By 80-0 93-0 13-0 
e Toluole, CaHs 110°3 1135 3°5 
oo Xylole, C2H,, 139°8 134-0 6:0 
| Tsocumole, GC, Hay | 1668 155°5 15°5 
8. Hydrocarbons from Oil of Cumin and Cuminic Acid. 
jcnlated boil- |Difference between 
hes pen by Ger- 
observed and calcu 
hardt’s theory. | lated boiling: ing-point. 
Determined 
Name of Substance. Formula. boiling-point. 
°o ° 
Cumole, C, gHye| 15! *E 154°5 | 43:4 
ymole, CoaHyi| TFO6 1750 | —46 
Cumo-oil of turpentine, Cp9H,,5) 155°4 160-0 +46 
The chief conclusions deduced from the foregoing facts and 
considerations may be briefly summed u 
1. That the boiling: pert difference for the addition of C,H 
hydrocarbons is gees 30° C., — 
been 
series was found eee to the rale just sated ae is pe 
_ Sented the boiling-point difference of about 20°, vv is but 
* See foot-note on page 224. 
