| cub. in. | |
| Carbonic acid | 5,9 |
| Nitrogene | 33,8 |
| Oxygene | 53,3 |
The 102 cubic inches before the experiment, were composed of
| cub. in. | |
| Oxygene | 78 |
| Nitrogene | 24 |
The residual gas in the lungs before the experiment, was 32 cubic inches, and composed of about 23 nitrogene, 4,1 carbonic acid, and 4,9 oxygene, [Section IV]. The residual gas after expiration, was composed of 18,2 oxygene, 2 carbonic acid, and 11,8 nitrogene.
Hence the whole of the gas in the lungs and airholder before inspiration, was 134 cubic inches, composed of
| cub. in. | |
| Oxygene | 82,9 |
| Nitrogene | 47,0 |
| Carbonic acid | 4,1 |
And after respiration, 125 cubic inches, consisting of
| cub. in. | |
| Oxygene | 71,5 |
| Nitrogene | 45,6 |
| Carbonic acid | 7,9 |
So that comparing the quantities, it appears, that 11,4 of oxygene and 1,4 of nitrogene, were consumed in this experiment, and 3,8 of carbonic acid produced.
I was much surprised at the small quantity of oxygene that had been consumed in this experiment. This quantity was less than that expended during the respiration of atmospheric air for half a minute: the portion of carbonic acid evolved was likewise smaller. I could detect no source of inaccuracy, and it was difficult to suppose that the greater depth and fulness of the inspirations could make any difference.