FOKMIC ALDEHYDE. 



321 



closed space by foi-mol vapour and obtained the same results as with 

 solutions, but the grain must remain at least five hours in an atmos- 

 phere containing formol. It sufi&ces to heat a tablet of formaline on 

 a spirit lamp, and close in the space. Bedford compared the action 

 of bouillie bordelaise made from 2 per cent of blue vitriol and 2 per 

 cent of lime with that of a formaline solution of 0'2-0"3 per cent. The 

 results showed the superiority of the formaline. 



TABLE LXVIII. — Showing the Results of Growing Oats from Undisinfected 

 Seed and from Seed Disinfected by 2 Per Cent Bouillie Bordelaise, and 

 from Seed Disinfected by 0-2 Per Cent and 0-3 Per Cent Solutions of 

 Formaline. 



TABLE LXIX. — Showing the Results of Grmoing Oats from Undisinfected 

 Seed and from Seed Disinfected by 2 Per Cent Bouillie Bordelaise, and 

 from Seed Disinfected by 0-2 Per Cent and 0-3 Per Cent Solutions of 

 Formaline. 



Variety of Oats. 



Doncaster Price 



Treatment. 



Nil 

 Bouillie bordelaise, 2 per cent 



Formaline, 0-3 per cent 



Duration 

 of Steep. 



5 minutes 

 10 „ 



10 



30 „ 



These results were submitted to a regular control in Canada, and 

 found exact. Bedford considers that an immersion of five minutes in 

 a formaline solution of 0"3 per cent suffices to guarantee crops com- 

 pletely against rust diseases. The seed is sown immediately after 

 steeping. Selby recommends steeping seed-wheat infested with Tilletia 

 spores first in water, then to remove the floating ones, then draw off 

 the water and replace by a 0-2 per cent of formaline. Bolley advises 

 a mixture of formol and corrosive sublimate as indisputably superior 

 to all other disinfectants. It would always give good results'; 



21 



