PLATE 75 



I. Fife wheat: A, B, control, 83 per cent germination; C, D, seeds treated with 

 formalin i to 320 for 3 hours, 62 per cent germination; E, F, seeds presoaked 6 hours, 

 then formalin i to 320 for 6 hours, 90 per cent germination. 



3. Poole wheat: A, B, control, 85 per cent germination; C, D, seeds treated with 

 formalin i to 320 for 6 hours, 55 per cent germination; E, F, seeds presoaked 6 hours, 

 then formalin i to 320 for 6 hours, 88 per cent germination. 



3. Effect of soaking in water throughout presoak period, compared with procedure 

 of keeping moist 6 hoiu-s: A, B, Fife wheat; C, D, Poole wheat; A, C, seeds soaked 

 in water 5 hoxu-s, then treated with formalin i to 320 for 7 hours; B, D, seeds soaked 

 in water 10 minutes, drained, and kept moist 6 hours, then treated with formalin i to 

 320 for 6 hours. Note the greater stimulation in B and D. 



