(per cent.)......... 24.00| 26.00| 48.00] 74.00 |r00.00 
22.30| 23.30] 17.30] 19.90] 15.50 
44] 53 5 66/  .78 
17.30] 7.00] 5.90] 4.30] 4.00 
70.90! 90.30! 62.60! 80.20] 85.50 
more nearly normal plants designated as 5N which 
respective numbers. It will be observed that very marked 
differences exist in the configuration of the plants due to the 
variation in light intensity. 
There occurred a general decrease in burning from the 
Re) 0. 
he leaves of the plants developed in the poorest light were 
burned badly and in some cases ki led, whereas in 5N no burning 
occurred and in 2, 3, and 4 burning was proportionate to the 
light condition under which they developed. 
In this experiment the larger and more vigorous plants, which 
were grown under the ae light intensities were more resistant 
to ane Dusme has 
d with cucumber plants which 
i 4 i 
varying p g 1 mo oisture rang- 
ing from Io to 70 per cent.of thei 1 g capacity. 
The burning resulting from fumigation with fhvcrocvanic acid gas 
was the most marked in the plants grown in the soil containing 
av s there was 
creased size with increased water supply. After giving these 
