CHEMISTRY. 



69 



(89) ESTIMATION OF CARBON DIOXIDE IN Am. 



Half an ounce (14 '2 ccm.) of lime-water containing '0195 gm. of 

 lime gives no precipitate when shaken in a bottle of the following 

 sizes the air in which contains the corresponding percentage by 

 volume of carbon dioxide. 



bottL 



The air of a room should give no precipitate when a 10^ oz. 

 >ttle full is shaken with half an ounce of cJ 



clear lime-water. 



