Apparatus For Estimating Carbon Dioxide 



145 



the amount of carbon dioxide required to give the precipitate is i.o 

 X io~ 7 grams, this amount is contained in 1.5 c.c. of the sample 

 or i c.c. contained 6.7 X icr 8 grams of carbon dioxide. The 

 amount of carbon dioxide actually contained in the sample was 

 5-5 X 5-5 X 7-1 X 5-6 

 52 X 52 X 50.7 X 255-6 C ' C ' = 6 " X I0 

 In six such determinations, all made with samples the concentra- 

 tion of which were unknown to the experimenter at the time of the 

 analysis, the results given in the following table were obtained: 



