84 



After treatment as above described, one hundred eyes for each 

 test were planted to note the effect of Corrosive SubHmate and Hy- 

 drocyanic Gas on germination : 



No. of Test. . Percentage of Eyes Which Germinated 



1 2 



2 7 



3 36 



4 Not planted 



5 70 



6 57 



7 73 



8 70 



It is seen that the length of time that the seed cane was in con- 

 tact with the gas had a marked effect on the vitality of the eye. 

 Corrosive sublimate apparently exerted no injurious influence as 

 far as germination was concerned, except in the case of a -1^ so- 

 lution. It is quite possil^le that the difference in the percentage 

 of germinating eyes, between test No. 6 and 7 was quite acci- 

 dental, owing to some slight difference in quality of seed cane 

 before treatment. 



Cane which had been soaked for several hours with ife and 2^ 

 solutions of Corrosive sublimate was not planted, but the eyes of 

 such cane showed remarkable vitality in the glass covered boxes. 

 At the end of a month's time, shoots six inches long projected from 

 the canes. 



The length of time in which leaf-hopper eggs may remain un- 

 hatched in the cane stick may be seen from the following figures, 

 which embrace a continuation of the count of insects hatching in 

 untreated canes. (Test No. 8, started Feb. 21) : 



