50 
MR. GROVE ON THE EFFECT OF 
passes through two similar portions of wire immersed in the same quantity of liquid, 
Fig. 1. 
and yet, in consequence of their being surrounded by a thin envelope of different 
gases, a large portion of the heat which is developed in the one portion appears to 
have been annihilated in the other. Similar experiments, varying the gas in one tube 
while hydrogen was retained in the other, gave the following results. In five minutes 
the thermometer rose — 
In the hydrogen. In the associated nitrogen. 
1st. From 60" to 69°’5. From 60° to 81°'5. 
2nd. 
In hydrogen. 
From 60° to 70°' o. 
In carbonic acid. 
From 60° to 80°. 
3rd. 
In hydrogen. 
From 60° to 70°. 
In carbonic oxide. 
From 60° to 79°‘5. 
4th. 
In hydrogen. 
From 60° to 70°‘5. 
In olefiant gas. 
From 60° to 76°\5*. 
On a different day I tried the following experiments ; all the circumstances were 
the same, excepting that the battery was in more energetic action, for which reason 
I have not tabulated them with the others. 
publication, I regret to say I did not read with the attention it deserved. I have read it since the experiments 
in this paper were commenced, and I see that I am now executing a task assigned to me by ray friend. 
M. Matteucci, for a different object, makes a somewhat similar experiment to the one given above, which 
however differs from mine in the material point, that he operated first on one gas and then on the other, and 
thus did not compare the effects produced by the same quantity of electricity. I cannot quite agree in the 
conclusions deduced by him from this and the other experiments he cites, but I will not here contest them, as 
it would lead me away from the main point of this paper. 
* I should perhaps remark, that several test experiments were tried to ascertain the working of the appa- 
ratus ; thus, the same gas was placed in both tubes, and the results given by the thermometer were found to 
be accurately the same in both vessels. The tubes were also changed with reference to the containing vessels 
and to the contained gases. The water was always agitated to render its temperature uniform previously to 
reading off, &c. &c. 
