Globe filled with common air gr. 2066,5 After exhaustion 2034,5 After introduction of nitrous gas, 82 cubic inches 2064,25 After the accidental admission of common air 2067,25 After the admission of oxygene 2091,75 —— —— 41 grains of water 2133,25 —— —— 51 cubic inches of air 2149,75 Taken out 54 grains of solution 2095,75 Introduced 13 grains of ammoniacal solution 2109,25 After introduction of common air 2106,5 And if from those 40 grains we take 13 for the solution of ammonia introduced, the remainder, 27, will be the quantity of solution of nitrous acid in water remaining in the globe, which added to 54, equals 81 grains, the whole quantity formed; but if from this be taken 41 grains, the quantity of water, the remainder 40 grains, will be the quantity of nitrous acid gas absorbed in the solution. To find the absolute quantity of nitrous acid formed, we must find the specific gravity of that absorbed; but as during, and after its absorption, 17 grains of air, equal to 53,2 cubic inches entered, it evidently filled such a space. 53,2 cubic inches of it consequently weigh 40 grains, and 100 cubic inches 75,17 grains. Then,75 cubic inches weigh,56 grains, and this added to 40, makes 40,56 grains, equal to 53,95 cubic inches, the whole quantity of aëriform nitrous acid produced. But the quantity of nitrous gas entering into this, allowing for the nitrogene it contained, is 27,6 grains, equal to about 80,5 cubic inches; and the oxygene is 40,56-27,6 = to 12,96 grains, or 36,9 cubic inches. V. There could exist in this experiment no circumstance connected with inaccuracy, except the impossibility of very minutely determining the quantities of common air which entered with the gases from the stop-cocks. But if errors have arisen from this source, they must be very inconsiderable; as will appear from a calculation of the specific gravity of the nitrous acid gas, founded on the volume of the gases that entered the globe. The air that remained in the globe after exhaustion was 15 grains = 47[23] cub. in. The nitrous gas introduced was 82 Common air 13 Oxygene 70 Common air 1 —— Whole quantity of air thrown into the globe 213 From which subtract its capacity 148 —— The remainder is 65 [23] Decimals are omitted, because the excess of the two first numbers is exactly corrected by the deficiency of the last.