from the Northern Part of the Yorkshire Coalfield. 247 



2. 0'33 of a cubic inch of the gas, (after the separation of 

 the sulphuretted hydrogen and carbonic acid gases,) was mixed 

 ■with 0-60 of a cubic inch of nitrous gas : an absorption of O-IO 

 took place, indicating 0*025 of oxygen gas ; and in 1 cubic 

 inch of the gas from the water, 0*045 of oxygen gas. 



3. On firing 0*5 of a cubic inch of the unabsorbable gases 

 with 0-575 of oxygen, the carbonic acid produced was 0-20, 

 and the oxygen that had disappeared 0*397 ; approximating 

 so closely to the quantity of carbonic acid gas produced, and 

 of oxygen gas consumed during the detonation of the carbu- 

 retted hydrogen gas from stagnant pools, that the composi- 

 tion of the gases may be considered the same ; and since that 

 <ras produces its own bulk of carbonic acid, the carburetted 

 hydrogen contained in 0*50 of the gas will be 0*20, and in 

 1 cubic inch of the gas from the water, will be 0*24. 



4. After the separation of the excess of oxygen by nitrous 

 gas the residual azote was 0*2625. The gases contained in 

 the water are : 



In one cubic inch of the gas. In a gallon of the water. 

 Cubic Inches. Cubic Inches. 



Carburetted hydrogen 0*24 2*88 



Sulphuretted do. . . . 0*22 2*64 



Carbonic acid .... 0*18 2*16 



Oxygen 0*045 0*54 



Azote 0*315 3*78 



1*000 12*00 



Saline contents. 



1. Evaporated one wine-gallon of the water gradually to 

 dryness ; it did not become in the least turbid: the concentrated 

 liquid tasted strongly alkaline, the solid residue weighed 38*5 

 grains. 



2. Dissolved the 38*5 grains in 8 ounces of distilled water, 

 and boiled a few minutes ; a small portion of flocculent matter 

 floated in the solution ; separated by subsidence and dried, it 

 weighed 0*3 grains. 



3. Into the clear solutions dropped nitrate of barytes as 

 long as any precipitate fell down ; collected by subsidence and 

 dried after repeated washings, it weighed 60 grains : this pre- 

 cipitate contained the carbonic and sulphuric acids existing 

 in the water. 



4. Upon the precipitate (No. 3.) poured dilute nitric acid : 

 nearly the whole was dissolved with effervescence ; the insolu- 

 ble part when dried weighed 9 grains, and was sulphate of 



barytes. 



5. Into 



