SIE B. C. BEODIE ON THE ACTION OE ELECTEICITY ON GASES. 
447 
Volume of gas at 0° 
and 7G0 millims. 
“ Titre” in eub. centims. 
at 0° and 960 millims. 
“Titre” on 100 volumes 
of gas. 
86-97 
4-28 
4-92 
269-5 
13-58 
5-04 
281-7 
14-29 
5-07 
272-8 
15-15 
5-55 
270-9 
14-74 
5-44 
The actual “titre” of the gas issuing from the induction-tube must, however, in all 
cases have been somewhat higher than that here given, since several hours were occupied 
in the collection of the gas, during which time the “ titre” was constantly although 
slowly diminishing. In the last experiment in the Table “the titre” of the gas was not 
taken until the day after that on which it was prepared, and must, judging from the usual 
rate of decomposition of the ozone, originally have amounted to at least 6‘5 per cent. 
The experiments recorded in the following Table were differently conducted, the 
“ titre ” of the gas being taken immediately after its exit from the induction-tube 
The temperature of the experiment is given in the first column. 
Temp. 
Volume of gas at 0° 
and 760 millims. 
“ Titre ” in cub. centims. 
at 0° and 760 millims. 
“ Titre” on 100 volumes 
of gas. 
0° 
88-97 
5'27 
5-93 

88-97 
5-65 
6-35 
- 9° 
88-15 
5-71 
6-47 
-10° 
88-15 
5-75 
6-52 
A very powerful coil was employed in these experiments. The passage of the gas in 
each experiment occupied about thirty minutes. The greatest contraction and highest 
titre attained in the experiments of Yon Babo and Claus was 5’74 per cent A ; but this 
was reached in only one instance, and the results of their other experiments were far 
below this amount. 
The following experiment was made with the view of ascertaining the effect of the 
repeated electrization of the gas by passing it several times through the induction-tube. 
The induction-tube was placed between two of the sulphuric-acid gas-holders previously 
described, so that the gas operated upon could be drawn through it from the one to the 
other, by causing a difference of pressure in the gas-holders, and thus submitted to the 
electric action as often as might be desired. After the passage of the gas through the 
induction-tube, portions of it were at intervals drawn off into the gas-pipette, and the 
ozone estimated as usual by iodide of potassium. 
A portion of oxygen was thus passed once through the induction-tube and there 
submitted to the action of the electricity generated by a powerful coil worked by means 
of five elements of Grove’s battery of the usual size. 
A pipette of 94 cub. centims. capacity was filled with the gas at barometric pressure 
and a temperature of 16° C., and the ozone estimated by passing it through iodide of 
potassium. 
* Loc. cit. p 303. 
