1886.] 



The Distribution of Micro-organisms in 



Air, 517 



© 



o 



3 



Total number 

 falling per sq. ft. 

 per minute 

 (calculated) . 



1 



1 



CO 

 00 



1 



i-H 



i> 



1 



o 



CO 

 r-l 



Total number 

 found in 10 litres 

 (calculated) . 

























r-l 



CO 







9 













>nies 



00 



CD 



itres 







tres 







tres 







: cole 

 >und, 



<N 

 i— 1 



rH 







CM 



r-l 







rH 









0, 



a 







_£ 













d 



oa 



CO 







00 







(N 

 CO 







Conditions of experiment. 



mtinuous rain pluvious day until morning 

 of experiment ; ground and surroundings 

 thoroughly wet. Wind E., fairly strong. 

 Tube pointed N.W. 4.12 p.m. Temp. 12° C. 



itermittent drizzling rain during morning ; very 

 heavy rain previous night. Wind S.W., not 

 quite so strong as on previous day. 5.25 to 

 6.30 p.m. Temp. 12° C. ; 



Ditto. 



fter thunderstorm (3 to 4 a.m.) and abundant 

 rain. Wind fairly strong and irregular in 

 direction^ N.E. to S.E. 10.45 a.m. Temp. 

 16 5° C. 



Ditto. 



ind S.W., moderate. Pavement dry, but heavy 

 rain all previous day and part of night. 6.10 

 P.M. Temp. 13° C. 



Ditto. 





O 



i—i 





















oT 









m 







m 







© 

 o 

 «J 



Ph 



Roof of Science School 

 12th May, 1886. 



Roof of Science Schoo] 

 13th May, 1886. 



i 





Roof of Science School 

 22nd May, 1886. 



c 

 « 





Roof of Science School 

 25th May, 1886. 



c 



r 





