CULTURAL WORK OX THE FUNGUS. 



29 



Experiment Xo. 25. 



1,000 c. c. formalin per 1.000 cubic feet of air space. 

 Temperature before mixing reagents. SO F. 



Thielaviopsis spores suspended in water. 



Initial growth of 

 fungus. 



Micro- 



Macro- 

 s pores. 



Check: fungus not exposed to formaldehyde gas 



Fungus exposed 15 minutes 



Fungus exposed 30 minutes 



Fungus exposed 60 minutes 



Hours. 



23 















Hours. 



Experiment Xo. 26. 



1.050 c. c. formalin per 1,000 cubic feet of air space. 

 Temperature before mixing reagents. 80° F. 



Thielaviopsis spores suspended in water. 



Initial growth of 

 fungus. 



Micro- 

 spores. 



Macro- 

 spores. 



Check: fungus not exposed to formaldehyde gas 



Fungus exposed 15 minutes 



Fungus exposed 30 minutes 



Fungus exposed 60 minutes 



Hours. 



22 















Hours. 



Experiment Xo. 21. 



1,100 c. c. formalin per 1.000 cubic feet of air space. 

 Temperature before mixing reagpnts. 78° F. 



Thielaviopsis spores suspended in water. 



Initial growth of 

 fungus. 



Micro- 

 spores. 



Macro- 

 spores. 



Check: fungus not exposed to formaldehyde gas 



Fungus exposed 15 minutes 



Fungus exposed 30 minutes 



Fungus exposed 60 minutes 



Experiment Xo. 28 



1,150 c. c. formalin per 1.000 cubic feet of air space 

 Temperature before mixing reagents, 66° F. 



Hours. 



23 















Hours. 



Thielaviopsis spores suspended in water. 



Check; fungus not exposed to formaldehyde gas 



Fungus exposed 15 minutes 



Fungus exposed 30 minutes 



Fungus exposed 60 minutes 



171 



Initial growth of 

 fungus. 



Micro- 

 spores. 



Hours. 

 29 

 

 

 



Macro- 

 spores. 



Hours. 



29 















