
Number of Micro-organisms in 10 litres of Air. 


Temperature Centigrade.® 
[BULLER AND LOWE] 


The black lines join the Experimental points. 
RES — The pecked lines join the Averages for each month. 
— The dot-and-dash lines join the Temperatures in Centi- 
grade degrees observed at the time of each Experi- 
ment. 
The dotted lines join the monthly Averages of Tempera- 
tures observed at the time of each Experiment. 
AIR COLLECTED ON THE CAMPUS OF THE UNIVERSITY OF MANITOBA, WINNIPEG 
[PLATE 1.] 














HIER 












































A 




























6 13 20 27 4 11 18 25 1 8 15 22 29 6 13 20 27 3 10 17 24 31 
APRIL May JUNE Jury AUG. 
1908 
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= 
14 21 28 5 12 19 26 2 9 16 23 
Serr. 
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; 
Ocr. 

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|| 


Nov. 
0 




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14 21 
Dec. 
1908 



28 4 11 18 25 1 8 15 22 1 8 15 22 29 
JAN. 
1909 

Yrs. 

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Beer tee 
Gane oes 
o 
Marcu 
1909 
