DR. E. FRANKLAND’S RESEARCHES ON ORGANO-METALEIC BODIES. 
265 
Observed 
volume. 
Height of 
inner column 
of water. 
Temperature. 
Height of 
barometer. 
Corrected volume 
at 0° C. and 
760 mm pressure. 
Volume ot‘ Hydride of Ethyl 
cub. cent. 
113-38 
mm 
178-5 
15-0'’ C. 
mm 
766-0 
cub. cent. 
108-23 
These determinations agree with the formula 
C 4 H, Zn, 
as is seen from the following comparison: — 
Calculated. Found. 
c, . 
(— 
. . . 2400 
39-01 
t 
I. 
38-64 
II. 
39-021 
III. 
Mean. 
38-83 
H, . 
. . . 5-00 
8-13 
8-25 
8-15] 
44-93 
8-20 
Zn . 
. . . 32-52 
52-86 

52-27 
52-27 
61-52 
100-00 
97-20 
99-30 
In experiment No. III. the volume of hydride of ethyl is considerably less than that 
required by the above formula, owing no doubt to its solubility in the acidulated 
water used as the confining fluid ; in fact a similar error, to a less extent, occurred 
in the corresponding experiment with zincmethyl*; but to place the cause of error 
beyond all doubt, the following additional determination was made. Into a graduated 
eudiometer tube, filled with mercury, an indefinite quantity of zincethyl, enclosed in 
a glass bulb, was introduced, the capillary stem of the bulb being broken inside the 
eudiometer tube. A few drops of water were now passed up into the same tube, and 
the apparatus was exposed to a heat gradually raised to the boiling-point of zincethyl, 
the eonversion of which into hydride of ethyl and oxide of zinc was thus perfectly 
effected, whilst a few drops of water only exerted an absorptive aetion upon the 
former. After the apparatus had again become cold, the following observations 
were made : — 
Observed 
volume. 
Temperature. 
Difference of 
mercury level. 
Height of 
barometer. 
Corrected volume 
at 0° C. and 
760 mm pressure. 
Volume of Hydride of Ethyl 
cub. cent. 
114-62 
13-5 C. 
mm 
135-0 
mm 
763-2 
cub. cent. 
88-61 
The oxide of zinc, carefully dissolved from the interior of the eudiometer and from 
the mercury, by dilute hydrochloric acid, re-precipitated as basic carbonate and then 
ignited, weighed ’1603 grrn. 
These numbers correspond almost exactly with those which ought to be obtained 
from zineethyl : — 
* Philosophical Transactions, 1852, p. 431. 
