32 
Analyses of Atmospheres varying in Carbonic Acid. 
Avge. of Car- 
bonic Acid 
per cent. 
Manchester streets, usual 0*0403 
During fogs 0*0679 
About middens 0*0774 
Average 0*0442 
Fogs excepted 0*0424 
Fogs and middens excepted 0*0403 
Where the fields begin 0*0369 
In close buildings ' 0*1604 
Minimum of suburbs 0*0291 
Over North Scotland (towns excepted) 0*0336 
Candle goes out 1*8 to 2*5000 
Lowest found in mines 2*5000 
Lowest entered 4*0000 
The greater part of this is given in Dr. Angus Smith’s 
Report cf On the Air of Mines” — Appendix to Report of the 
Royal Mines Commission, 1864. 
