Lerts anp Bhaxe—On Atmospheric Carbonic Anhydride. 447 
CO. FounpD at N.T.P. 
No. Found in 40 c.c. of | Calculated amount in 
absorbent. | 50 c.c. of absorbent. 
1 1-706 2°132 
2 1°724 2°155 
3 1°706 2-132 
4 1°638 2°047 
5 1:643 2-054 
No | Total COz2 found in |Minus amount in blank | Equals CO2 absorbed 
* | 50 c.c. absorbent. determination. from artificial mixture. 
1 Hoi ayy 0°196 1:936 
2 2°155 0°196 1:959 
3 2°1382 0:196 1:936 
4 2°047 | 0-196 1851 
5 2°054 0°196 1°858 
Results of 5 Determinations. + 
No. | CO2 taken at N.T.P. | COz found at N.T.P. Error. 
1 1-938 c.c. 1°936 c.c. — 0:002 c.c. 
2 1:945 ,, 1:959 ,, OO 
3 1-968 _,, IEG 55 — 0-032. ,, 
4 1-90) 1851 ,, — 0-060 _,, 
5 1:906 ,, 1:858 ,, — 0-048 ,, 
Mean 1-938 ,, Oe his to) GNC ees 
As the receiver had a capacity of 6586 c.c. these results may be 
summed up as follows :— 
Equivalent in parts 
On the COz taken. 6 10,000 of air to :— 
Mean error, ° : : 1-3 per cent., . 3 , 0°04 
Greatest error, . : 3 Sols ish : a 0-09 
Least, ° c ; : O°0 Paina . : 0-00 
