PLATE 37 



A. — Pots showing germination of treated seed stored for 32 days after disin- 

 fection with a 0.1 per cent solution, of formaldehyde: No. 1, stored dry in labora- 

 tory; No. 2, stored damp in laboratory; No. 3, stored dry in refrigerator; No. 4, 

 stored damp in refrigerator; No. 5, stored dry in greenhouse; No. 6, stored damp in 

 greenhouse; No. 7, control, untreated. 



B. — Wheat plants grown in soil from seed stored for 60 days after disinfection with 

 a 0.1 per cent solution of formaldehyde: No. i, stored dry in refrigerator, germina- 

 tion 18 per cent; No. 2, stored dry in laboratory, germination 34 per cent; No. 3, 

 stored dry in greenhouse, germination 70 per cent; No. 4, stored damp in greenhouse, 

 germination 100 per cent; No. 5, control, untreated, germination 100 per cent. 



