360 Mr. Moyle's Analysis of the Atmosphere 



Nitrogen 8 1 *5 1 9 per cent. 



Oxygen 18-416 



Carbonic acid .... 0*065 



100000 



Sample 2. One gallon. 

 Wheal Vor. — As before. 250 fathoms from surface ; six- 

 teen fathoms east of any shaft or winse ; two men in a core ; 

 ten minutes after firing a hole ; specific gravity *993. 



Oxygen. 

 Average of six experiments with hydrogen .... 16*7 

 Average of four experiments with nitrous gas .... 16*62 

 Average of two experiments with platina ball .... 16*75 



Mean . . . 16*69 



Garb. acid. 



Average of three experiments with lime water ... 0*075 



Average of three experiments with alkaline solution 0*075 



Mean . . . 0*075 

 Composition of this sample: — 



Nitrogen 83*24- per cent. 



Oxygen 16*69 



Carbon, acid .... 0*075 ... 



100*005 

 Sample 3. One gallon. 

 Wheal Vor. — As before. 240 fathoms ; twenty-four fathoms 

 east of any shaft or winse ; two men in a core ; taken half an 

 hour after firing a hole ; specific gravity *997. 



Oxygen. 

 Average of three experiments with hydrogen . .". . 19*2 

 Average of three experiments with nitrous gas .... 1 9*0 

 Average of two experiments by the slow combus-H ,_ 



tion of phosphorus over mercury J 



One experiment with platina ball 19*0 



Mean . . . 18*95 



Carb. acid. 

 Average of three experiments with lime water . . . 0*06 

 Average of three experiments with alkaline solution 0*07 



Mean . . . 0*065 

 A sample of the above air taken in a four-ounce bottle se- 

 cured by mercury, gave strong indications of both sulphuretted 

 hydrogen and sulphurous acid : quantity not ascertained. 



