1886.] The 



Distribution of Micro- 



-organisms in Air. 



519 



03 





 — 



rfi 



- ■ = S3 

 ~ s- = - 



- — '3 -CJ 



- - = - 



c © a 



o -5 a. 3 





o 

 co 



CO 



GO 



X 





00T 



CO 



rH 



CO 



30 

 X 



H ~ ^ 





















number 

 m 10 litres 

 ulated). 





; 



CN 



co 







: 





CO 



Total 

 found 

 (calc 





















No. of colonies 

 found. 



2 in 10 litres 





30 in 12 litres 



1 



rH 



.2 



CO 

 rH 



7 in 10 litres 







5 in 10 litres 



i 



o 

 —1 



CO 



Conditions of experiment. 



Wind E., in gusts, but not very strong ; ground 

 partially hard with frost and partially moist ; 

 occasional sunshine. Noon. Temp. 1° C. 



Similar, but less wind. Dish exposed on grass 

 lawn. 1.30 p.m. Temp. 5° C. 



g 



EH 



%i 



Ph 



s 



CO 



d 

 © 



o 



""3 o 

 d CO 



r 



Mist ; wind S.E., strong to moderate ; ground 

 wet (grass) ; air very moist. Dish exposed 

 3 ft. from ground. Temp. 13° C. Noon. 



Wind E., moderate, blowing across country. 

 Heath covered with dry heather. Noon ; 

 sunshine. Temp. 13° O. Dish placed oh 

 stand 3 ft. 6 in. above ground. 



Wind E., blowing across Norwich, less strong 

 than in morning ; sunshine. Temp. 12° C. 

 4 to 5 p.m. Grass. 



: co 

 Q 







p*, 



5 

 © 

 EH 



Jbo 



QQ 



Wind E. ; conditions much as in previous experi- 

 ment. 11 to 12 a.m. ; sunshine. 



d 



rH 



s 



O 



EH 



d 



00 

 00 



43 



To 



00 



■a 8- 











a & co 

 > X 

 o o 2 

 C ° 



O * ~ 

 -CO 

 ^ ON 

 o e» . 



.3°— 



O *5 SO 



o "2 





Garden, near Norwich. 

 25th April, 1886. 



L cd 

 ox 



it 



2^ 



CD O 

 •4 



Garden, near Norwich. 

 28th April, 1886. ' 



Place. 



Edge of Reigate II i 

 about 700 ft. 7 

 February, 1886. 



Garden on Reigato Hi 

 200 ft. lower. 7 

 February, 1886. 



Lawn in garden on R 

 ga t e Hill. 23rd Mi 

 1886. 



It 

 'o 



^'co 



Sox 

 3 '2 X 

 O ? rH 



Garden, near Norwk 

 23rd April, 1886. 



