224 
Scientific Proceedings, Royal Dublin Society. 
First REsutts. 
The air samples for both processes were not collected simultaneously. 
PETTENKOFER. 
Lerts anp Bruaxe. 
co, CO, in 
Number. | x0,000 parts | Duplicate. Difference. || x0,000 parts | Duplicate. | Difference. 
IL ae I Il. 
1 6:07 _— —_— 3°41 1 3°16 25 
2 4-40 4°73 -33 3°19 3°16 03 
3 4:04 4:27 "23 2°69 2°67 02 
4 8°35 3°46 ‘ll 3°20 3°16 04 
5 4°46 4:79 °33 8°44 3°47 03 
6 3°28 3°44 “16 —_— — — 
Mean, . 3°90 4:14 -23 3°18 3°12 07 
The above determinations may be considered as merely preliminary 
trials to accustom me to the necessary manipulation. 
Sreconp SERIES—CoMPARATIVE DETERMINATIONS. 
(Smartt ReEcrrvers. ) 
The air samples for both processes were collected simultaneously. 
PETTENKOFER. Letrs anD Buake. 
CO, in CO, in 
Date. 10,000 parts | Duplicate. | Difference. || 10,000 parts | Duplicate. | Difference. 
of air. of air. 
Py II. le IDE 
Feb. § 4-70 5°13 43 3°13 3°15 02 
99 9 4°42 4°85 “43 2°96 = — 
LO 4-40 4°75 °35 2°81 2°86 05 
op) abs 4°28 4°31 08 2°73 2°77 04 
» 14 4°13 4°31 "18 2°68 2°68 00 
boy alli) 4:02 4°15 13 2°67 2°67 01 
Mean,.. 4°31 4-58 ol 2°83 2°82 02 
1 This determination was performed by Mr. Blake, to show me the method of 
manipulation. 
