[Vor. 1 
78 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
TABLE IX 
DATA ON THE COLLECTION AND EXAMINATION OF AIR SAMPLES 
No. of experiment 1 2 3 4 5 6 7 
Date of collection 2/12/13 | 2/22/13 | 3/15/13 | 3/15/13 | 3/19/13 | 3/22/13 3/22/13 
. 5 and 5 and 
Sampling place Lab. [Outdoors | Street car 10e. store Street car| Street car 10s wd» 
Outdoors 60 29 32 36 50 23 50 
Temperature (?F.) 
Sampling pl. 80 29 45 70 48 45 70 
БЕ i А Windy | Windy я a 9 
Weather conditions Sunshine | Snowing snowing | snowing Sunshine | Sunshine | Sunshine 
Sitting 0 0 44 1 44 44 1 
Approx. no. of 
persons Standing 2 0 0 100 30 30 50 
Approx. volume of sampling pl. 3000 2500 72000 2500 2500 72000 
(cu. ft.) 
Volume of air exam. (co.) 7800 22500 10800 10800 10800 10800 10800 
Rate of filtration (cc. per min.) 520 750 900 900 900 900 900 
Pl. I. (1 се.) 2 2 4 30 9 250 4 
Pl. II. (1 се.) 2 8 3 36 6 250 3 
No. of organisms|Pl. III. (2 cc.) 4 0 
in following 
quantities of Too num- 
sand solution|Pl. IV (5 cc.) 6 12 230 25 | erous to |Spreader 
plated count. 
Too num- 
Pl. V. (5 со.) 20 200 26 | erous to 23 
count, 
А I., П. and |I., II. and 
Plates examined II. IV. V. II. у. 1/12 of I. V. 
Total col. on plates exam. 8 16 20 36 26 21 ge 12 23 
No. of bacilli, molds, eto, 4 8 9 16 "I > 1/ 12 i 
No. of cocci 4 8 11 20 10 16 on 1/12 8 
of I. 
No. of salivary cocci 1 0 2 0 0 6 = y 12 0 
Frequency of occurrence lin 1950 0 | 111800 0 0| 11іп10 0 
. Е Probably Probably 
Sanitary quality vue Safe ndi Safe Safe Unsafe Safe 
No. of org. in total vol. of air 30 42 50 570 95 3750 58 
