34 



Levi Otto Gratz 



could be elevated from the bottom of the tank by placing them on small 

 inverted flowerpots. Better circulation in the water bath was thus 

 afforded, so that a larger number of culture vessels could be placed in 

 each tank without reducing the uniformity of the temperature. Instead 





Per cent of 

 damping-off 



20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 

 Hours after transplanting 



Figure 4. influence of different soil temperatures and soil moistures on 

 kate of damping-off of cabbage seedlings caused by corticium vagum 

 (table 9, trial iv) 



Soil temperatures are given as percentages 



