Comparative Air-Analyses 



87 



Table 51. Analyses of outdoor air made at the Nutrition Laboratory. 1 Series 



Date. 



1909. 

 Apr. 5 



Apr. 6 



Apr. 8 



Apr. 9 



Apr. 10 



Apr . 12 



Apr. 17 



Apr. 19 

 Apr. 20 



Apr. 21 

 Apr. 22 

 Apr. 23 

 Apr. 28 



Apr. 29 

 Apr. 30 



May 1 



May 3 

 May 8 



May 10 

 May 12 

 May 13 

 May 14 

 May 17 

 May 18 

 May 20 

 May 21 



May 22 

 May 22 

 May 24 

 May 25 

 May 26 

 May 27 

 May 28 

 May 29 

 June 1 

 June 2 

 June 3 

 Oct. 18 



Oct. 19 



Time. 



ll h 45 m a.m. 

 4 00 p.m. 



11 00 a.m. 



11 00 a.m. 

 5 00 p.m. 



10 00 a.m. 



12 00 noon 



10 00 a.m. 

 ii 66 a.m. 



a.m 



3 h 00 m p.m. 



a.m. 

 p.m. 



Tem- 

 pera- 

 ture. 



D C. 



16.4 

 11.0 



S.3 



6.8 



11.0 



13.7 



12.1 



23.7 



8.5 



6.8 

 14.0 

 14.7 

 10.9 



13.3 

 2.7 



6.1 



11.0 



23.3 

 21.9 

 23.2 

 26.0 

 10.1 



13.0 

 13.9 



8.5 



5.5 



28.0 



19.0 



31.2 

 14.3 

 12.2 



21.6 

 23.7 



Ba- 

 rom- 

 eter. 



mm. 

 764.10 



761.35 

 758.50 



756.50 



760.65 



774.50 



767.50 

 767.15 

 752.50 

 765.35 



769.90 

 756.30 

 760.30 

 760.00 



770.50 

 763.65 



Wind. 



Light SW . . . 



E 



SW. gale . . . 



Weather. 



C dtT Oxy- 



ide. I S en - 



SE. 



w. 



s . 



Pleasant 



.Do. 

 .Do. 



Rain 



S .., 

 s. .. 

 sw 



NE. 



Pleasant 



West side. 



E.. 

 W. 



N. 

 W. 



Pleasant 

 Pleasant 



N. 

 E.. 



....Do. 

 Rain . , 



764.00 

 757.75 

 761.00 



769.65 

 770.15 



766.00 

 764.00 

 756.70 

 762.85 

 769.10 

 766.70 

 756.70 

 752.60 

 762.00 

 764.30 

 760.55 



SW. 



w.. 



E... 



E. 



NE 



NE. strong . 



W 



NW 



NW 



S 



N 



N 



NW 



SE 



SW 



Rain . . . 

 Pleasant 



771.45 



NW. 



Stormy . 

 Pleasant 

 Pleasant 



p. ct. 



0.031 

 .032 

 .028 

 .026 

 .029 

 .030 

 .027 

 .030 

 .027 

 .029 

 .030 

 .029 

 .030 

 .031 

 .032 

 .030 

 .031 

 .031 

 .031 

 .032 

 .032 

 .030 

 .030 

 .032 

 .030 

 .028 

 .028 



'.028 

 .029 

 .029 

 .031 

 .028 

 .030 

 .029 

 .029 

 .029 

 .031 

 .029 

 .028 

 .030 

 .029 

 .031 



p.cl. 

 20.929 

 20.921 

 20.920 

 20.921 

 20.922 

 20.918 

 20.919 

 20.920 

 20.921 

 20.920 

 20.920 

 20.901 

 20.911 

 20.921 

 20.921 

 20.922 

 20.920 

 20.921 

 20.920 

 20.901 

 20.902 

 20.919 

 20.921 

 20.920 

 20.921 

 20.922 

 20.920 



20.9ii 

 20.919 

 20.921 

 20.920 

 20.920 

 20.912 

 20.911 

 20.901 

 20.921 

 20.902 

 20.902 

 20.922 

 20.920 

 ; 20.921 

 20.920 



Pleasant 

 Cloudy . 



Pleasant 



20.950 

 20.950 

 20.949 

 20.940 

 20.949 



.031 

 .032 

 .028 



20.920 

 20.919 

 20.919 



East side. 



Car- 

 bon 

 diox- 

 ide. 



p. ct. 

 0.029 

 .028 

 .029 

 .028 

 .026 

 .030 

 .030 

 .031 

 .029 

 .030 

 .029 

 ; .030 

 .032 



'.029 



'.030 

 .030 

 .030 

 .032 



'.029 



.031 

 .028 

 .034 

 .032 

 .028 

 .032 

 .030 

 .029 

 .029 



'.030 

 .028 



.030 



'.028 

 .029 

 .030 

 .029 



Oxy- 

 gen. 



p. ct. 

 20.920 

 20.941 

 20.880 

 20.921 

 20.931 

 20.921 

 20.919 

 20.920 

 20.920 

 20.921 

 20.921 

 20.931 

 20.902 



20.920 



20.922 

 20.920 

 20.920 

 20.902 



20.9i9 



20.920 

 20.921 

 20.920 

 20.920 

 20.910 

 20.918 

 20.920 

 20.919 

 20.919 



20.9i0 

 20.920 



20.902 



20.920 

 20.920 

 20.919 

 20.920 



1 In all of the analyses of air made in this research, the temperature of the water bath varied from 17 

 to 21 C. and was usually not far from 19 or 20 C. Subsequent experiments (see p. 97) showed that tem- 

 perature variations do not materially influence the results. 



2 In this analysis the mercury in the compensation tube was inadvertently brought back to after the 

 carbon dioxide had been absorbed. 



west side of the building and those from the east side. In view of these 

 results it was not considered necessary to draw samples from both sides of 

 the building, and only those drawn from the west side were analyzed for 

 the remainder of the research. Aside from certain values which are ob- 

 viously erroneous, it would appear that the average percentage of oxygen 

 was not far from 20.92, as indicated by this technique and under these Con- 

 di tions. The fluctuations in the percentage of carbon dioxide are those 

 commonly experienced and represent nothing unusual, save that on 

 days when the wind was blowing directly from the thickly settled por- 

 tion of the city a much higher carbon-dioxide content than at other times 



