346 On two new Compounds 
It was now placed for the day (Oct. 18) in the rays of the sun; 
but the weather was not very fine. In the evening the solid 
crystalline substance had formed in abundance, and very little 
fluid remained. When placed over chlorine, not the slightest 
change in volume had been produced. The stop-cock was now 
opened under mercury, and a small portion of the metal having 
entered, it was agitated in the retort, to absorb the chlorine; the 
neck of the retort was left open under the mercury all night, 
and the whole agitated from time to time. Next morning (ba- 
rometer 29-6) the mercury which had entered, being passed into 
the neck of the retort, stood at a certain mark six inches above 
the level. of the mercury in the trough, occupying 1°25 cubic 
inch, and leaving 24 cubic inches filled by the expanded muriatic 
acid gas and nitrogen. These volumes corrected to the pres- 
sure of 291 inches give 578 cubic inches for the chlorine ab- 
sorbed, and 19°47 cubic inches for the muriatic acid gas, &c. 
These absorbed by water left 1-2 cubic inch of nitrogen; so that 
the gases in the retort, after the action of solar light, were, 
Cubic inches. 
Muriatic acid gas) 4. we we (1827 
Chlorine ee ee ee ee 5°78 
Nitrogens QC. aig, °.\.0:00- \/sin8'y, fa 1:2 
and before that action, 
Chlorine él GROAN eh) & antl eae 
OLSANE 08 | .6.0 Abe's i.) cad abl tard BEO 
Nitrogen Pah bell tittec hihi wtp nee 
Hence 23°47 cubic inches of chlorine had disappeared, and 
9-13 of these had entered into combination with an equal volume 
of 9:13 cubic inches of hydrogen liberated from the five cubic 
inches of olefiaut gas, to form muriatic acid ; and, consequently, 
14-34 cubic inches of chlorine remained combined with the car- 
bon of the five cubic inches of olefiant gas. Here, the volume 
of chlorine actually employed is not quite five times that of the 
olefiant gas, nor the volume of muriatic acid gas produced, equal 
to four times that of the olefiant gas; but they approximate ; 
and when it is remembered that the conversion was not quite 
perfect, and that the gases used would inevitably contain a slight 
portion of impurity, the causes of the deficiency can easily be 
understood, 
In other experiments made in the same way, but with smaller 
quantities, more accurate results were obtained: one cubic inch 
of olefiant gas with 12°25 cubic inches of chlorine, produced by 
the action of light 3:67 cubic inches of muriatic acid gas, 4-963 
of the chlorine having been used. 1°4 cubic inch of olefiant gas 
with 12°5 cubic inches of chlorine produced 5°06 cubic inches 
of muriatic acid gas, 6-7 cubic inches of chlorine having been 
used. 
