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Experiment III. An ounce measure of oxygen air added to two of this air in the eudeometer of Volta could not be exploded by the electrick spark. But upon adding a second measure of oxygen, the explosion was very loud, and one measure and a half disappeared. The air left in the eudeometer was found to contain carbonick acid, which was proved by passing one hundred parts through lime water, which was rendered turbid, and twelve and a half parts were absorbed, giving the quantity of the carbonick acid. After this last experiment the remaining air was highly inflammable, burning for a considerable time.
SECOND BOTTLE.
The air in this bottle was found a little different from the first, being collected in another place, a little distance off. The first and second experiments turned out as before; so did the third.
Experiment IV. Two measures of oxygen and two of the air being put into the eudeometer of Volta, being fired by the electrick spark, only half a measure was absorbed, with a less explosion than before.
Experiment V. To two measures of the air were added two and a half of oxygen. As before, they now exploded by the spark violently, and one and a half measures were absorbed. The portion of carbonick acid was the twenty-fifth part; the remainder still burning as at first, i. e. before any experiments were made.
