PLATE 40 



Varying injury to wheat treated with a 0.1 per cent solution of formaldehyde, and 

 stored in sealed bottles: 



A. — Sealed immediately after treatment, 100 per cent germination. 



B. — Sealed after drying 7 hours, spread on towels in laboratory, no germination. 



C. — Sealed after drying 24 hours, spread on towels in laboratory, no germination. 



D. — Sealed after drying 3 days, spread on towels in laboratory. 14 per cent ger- 

 mination. 



The control germinated 96 per cent. 



