168 



TEAGUE AND BARBER. 



Temperature readings were made through the glass doors of the hood 

 as follows: 



Time. 



Dry-bulb 

 thermometer. 



Wet-bulb 

 thermometer. 



Difference. 



10. 51§ to 10.52. 



i 

 Cholera suspension 



sprayed. 





10. 58 a. m. | 



30°. 6 C. j 28°. 3 C. 



2°.3C. 



12. 02Ho 12.03. 



Cholera suspension 

 sprayed. 





12.38 p. m. 



31°. C. 1 30°. 9 C. 



0°.l 



1.43tol.43i 



Sarcina suspension 

 sprayed. 





1. 44i to 1.45. 



Cholera suspension 

 sprayed. 





1. 50 p. m. 





31°.95 C. 



31°. 3 C. 



0.05 



2. 00 p. m. 





31°.31 



31°. 26 



0.05 



The results of this experiment are shown in Table II. 



Table II. — Results of spraying experiments. 



Time after 

 spraying. 



Cholera 



suspension 



in the dry 



hood. 



Cholera 



suspension 



in the wet 



hood. 



Wet hood. 



Cholera. 



1 

 Sarcina. 



Hrs. min. 



Colonies. 



Colonies. 



Colonies. 



Colonies. 



J 



21,000 



130.000 



Innumerable. 



104, 000 



3 



170 



33,000 



34,000 



31.000 



6 







24,000 



4,700 



15,000 



9 







2.600 



1,800 



13,000 



12 







470 



195 



7,000 



15 







220 



300 



6,000 



18 







38 



20 



3.000 



21 





18 



52 



2,400 



24 





8 



18 



2,800 ' 



27 

 30 





2 

 



8 

 4 



1,600 

 1,700 





36 

 40 



50 



1 







 

 

 





 

 

 



1,000 

 900 

 600 

 360 









1 30 



2 









 



135 



86 







2 30 











31 



3 

 3 30 









 



16 

 1 











In the dry hood the living cholera vibrios had all disappeared 

 from the air six minutes after the spraying was discontinued, 

 whereas in the wet hood living cholera vibrios were present 

 after twenty-seven minutes. The wet- and dry-bulb thermom- 



