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 {f On the Air of Mines” — Appendix to Report of the 
Royal Mines Commission, 1864. 
