CULTURAL WORK OX THE FUNGUS. 

 Exp\ riment No. 5. 



23 



950 c. c. formalin per 1.000 cubic feet of air space. 

 Temperature before mixing reagents, 78° F. 



Thielaviopsis cultures in petri dishes. 



Initial Vigorous 



growth growth 



of fungus, of fungus. 



Checks; fungus not exposed to formaldehyde gas 



Fungus exposed 15 minutes 



Fungus exposed 30 minutes 



Fungus exposed 60 minutes 



Hours. 



Hours. 



22 



49 



67 



115 



140 



209 











Experiment No. S. 



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

 Temperature before mixing reagents. 74 : F. 



Thielaviopsis cultures in petri dishes. 



Initial 



Vigorous 



growth 



growth 



of fungus. 



of fungus. 



Hours. 



Hours. 



21 



45 



144 



ltf 



144 



1^ 



233 



257 



Checks; fungus not exposed to formaldehyde gas 



Fungus exposed 15 minutes 



Fungus exposed 30 minutes 



Fungus exposed 60 minutes 



Experiment No. 



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

 Temperature before mixing reagents, 78" F. 



Thielaviopsis cultures in petri dishes. 



Initial Vigorous 



growth growth 



of fungus, of fungus. 



Hours. Hours. 



Checks; fungus not exposed to formaldehyde gas 20 48 



Fungus exposed 15 minutes 



Fungus exposed 30 minutes 163 211 



Fungus exposed 60 minutes 



Experiment No. 8i 



1,050 c. c. formalin per 1,000 cubic feet of air space. 

 Temperature before mixing reagents, 65° F. 



Thielaviopsis cultures in petri dishes. 



Initial Vigorous 



growth growth 



of fungus, of fungus. 



Hours. 



Checks; fungus not exposed to formaldehyde gas 21 



Fungus exposed 15 minutes 118 



Fungus exposed 30 minutes 



Fungus exposed 60 minutes 



171 



Hours. 

 49 

 223 





 



