456 
ME, C. GEEVILLE WILLIAMS OX SO^^IE OE THE PEODUCTS 
with Kolbe’s determination made at the same temperature, which gave 0*6940. It 
undergoes considerable expansion with even a small rise of temperature, for Wuetz 
found the density at 0° to be 0*7057. 
Amyle. 
The experiments previously made having indicated somewhat too high a boiLing-point 
for the butyle, it was considered necessary to examine the fractions ha%'ing boiling-points 
at all approaching to that of amyle with great care, in order to ascertain whether the 
same difference would be found. The following Table contains the results : — 
Vapour-densities of fractions from 154° fo 169°, after treatment with nitric arid, dr. 
Boiling-point. 
Excess 
of weight of 
balloon. 
Temperature 
of vapour. 
Temperature 
of air. 
Pressure. 
Capacity 
of 
balloon. 
Residual 
air. 
Density. 
grm. 
mm. 
cub. cent. 
cub. cent. 
154 to 160 
•6187 
210 
19 
756 
274 
4-0 
4-82 
160 to 162 
•7581 
208 
21 
765-5 
305-5 
0 
5-02 
160 to 165 
•7855 
193 
19 
752 
305-5 
1-5 
5-02* 
163 to 164 
•7518 
210 
20 
765-5 
298 
0 
5-11 
166 to 169 
•6980 
207 
18 . 
757 
275 
0 
5-llt 
It was quite obvious, from the numbers condensed into the above Table, that the 
amyle from the Torbane-hill mineral boiled between 154° and 160° ; but the fii*st experi- 
ment which was made upon the entire fluid boiling between these points proving too 
low, a fraction was selected distilling in the sixteenth rectification between 157° and 160°. 
*1949 gramme gave *6032 carbonic acid and *2757 water. 
Experiment. Calculation. 
Carbon .... 84*4 120 84*5 
Hydi*ogen . . . 15*7 22 15*5 
142 100*0 
The following are the results obtained by Feanklaxd and Wuetz; — 
Eeaxklaxd. Wtjetz. 
A 
Carbon . . , 84*2 84*6 84*2 
Hydrogen . . 15*4 15*2 15*4 15*7 
To confirm the result obtained in the analysis of the amyle fi*om the above fraction, 
the density of its vapour was ascertained. 
Excess of weight of balloon . . . *6746 grm. 
Temperature of vapour . . . . 212° 
* Erom fraction of crude naphtha distilling between 154° and 160°. 
t This result was obtained during the preliminary experiments ; the fluid had not been absolutely freed 
from bodies of lower boiliag-point. 
