364 Mr. Moyle's Analysis of the Atmosphere 



three fathoms from winse or shaft; two men in a core ; half an 

 hour after firing a hole ; specific gravity 0*998. 



Oxygen . 

 Average of three experiments with nitrous gas . . . 17*56 

 Average of three experiments with hydrogen . . . 17*50 

 Average of three experiments with quadrisulphuret'l 



Average of two experiments with hydrogen in mer-1 

 curial trough from a mercurial sample J 



Average of two experiments with nitrous gas in "\ 

 ditto from ditto J 17 ' 56 



Mean . . . 1 7*54.4. 



Carb. acid. 



Average of three experiments with lime water ... 0*10 



Average of two experiments with potash solution . . 0*10 



Mean . . . 0*10 

 A trace of both sulphuretted hydrogen and sulphurous acid 

 was observable in the mercurial samples. 

 Composition of sample : — 



Nitrogen 82356 per cent. 



Oxygen 17*544 



Carbonic acid . . . 0*100 



100*000 



Sample 11. One gallon. 



Binner Downs. — Copper mine; slate. 104-fathom level; 

 eighteen fathoms from winse or shaft ; two men in a core in 

 a rise ; specific gravity 0*996. 



c Oxygen. 

 Average of four experiments with hydrogen .... 16*73 

 Average of two experiments with nitrous gas .... 16*80 

 Average of two experiments with 'quadrisulphuret !,«,,,. 



of lime .' . . j lb ' 77 



Average of three experiments with 'hydrogen in ~\ lfi .- fi 



mercurial trough from a mercurial bottle sample J 

 Average of two experiments with nitrous gas inl lfi .^ fi 



ditto from ditto j 



Mean . . . 16*764 



Carb. acid. 



Average of five experiments with lime water and so-\ 0>ftQ 



lution of potash J 



A strong trace of sulphuretted hydrogen in the mercurial 

 sample. Composition of sample, therefore, 



