Letrs & Braxe—The Carbonic Anhydride of the Atmosphere. 1388 
Srrtes 4.—(ArtiriciaL Mixtures). 
Paraffined Winchester Quarts containing purified air and known volumes 
of carbonic anhydride. Titrations performed in vacuum apparatus 
No. 2 with the whole of the solution—sucked out as far as pos- 
sible—but the receivers were not washed out. 
0:935 c.c. CO, added at N. T. P. 
Ee ie | SPOT My Badeecatcea, |, Garten agtvee 
1 60 c.c. 89°00 c.c. 1-100 c.c. 
2 i; 40:90 ,, 0-910 ,, 
3 i 41-00 ,, 0-900 ,, 
4 + 41:90 ,, 0-810 ,, 
5 be 41°50 ,, 0°850 ,, 
6 i 41-00 ,, 0-900 ,, 
Carbonic anhydride taken, : = 0935 Gc 
a 55 found (mean), . = OO 5 
Error (mean), ; . =— 07024 ,, 
Series 5.—(ArririctaL Mrxrurss). 
Paraffined Winchester Quarts containing purified air and known volumes 
of carbonic anhydride. ‘Titrations performed in vacuum apparatus 
No. 2. Receivers washed out with about 50 c.c. of neutralized 
distilled water, the washings being added to contents of vacuum 
apparatus. 
Barometer = 763mm. T.=20°C. 1c.c. CO, added = 0:935 c.c. at N. T. P. 
1 50 c.c. 40-40 cc. | 0-960 
2 ee 40°40 ,, 0-960 
3 Pale 40°00 ,, 1-000 
E wit 40°50 ,, 0-950 
5 Par | Spoilt. —_— 
6 aide | 40°55 ,, | 0°945 
Carbonic anhydride taken, : 5 = O85 oa: 
s'5 5 found (mean), . = 0°963 ,, 
Error (mean), . : . =+0°025 ,, 
