71 



(6) D4. Disease appeared 1 week after stock arrived from Exeter. 

 E14. „ 2 weeks „ „ „ 



KM. „ 3| months „ „ S. England. 



F14. „ 6 months after introduction from Wales. 



See also under (2). 



(2) In relation to other affected stocks in Lewis. 



B14. 1 More than 7 months after the termination of the previous 



C13. J outbreak. 



Dl. Three months after B14 and C13. 



F14. Six months after introduction, upon which it had been placed 



in hive in which a stock, E14, had just died out from 



Isle of Wight disease. 



(3) Duration, where not interfered with. 



B14. A few days, and recovered. 



Dl. 40 days, and died out. 



KM. 32 days, and died out. 



E14. June to beginning of winter, and died out. 



Gp. July to winter, died out. 



F14. Few weeks — recovery — recurrence in the following year, 

 lasting August to September 1915. 



(4) Relation to Nosema apis. 



1. Spores found in only two cases coincident with Isle of Wight 



disease symptoms. 



2. Young stages were found in two other affected stocks, one of which 



completely recovered. 



3. Healthy stocks known to have Nosevia all the time in which no 



outbreak of Isle of Wight disease occurred. 



' Placed on a new site when introduced. 

 Strong stock. 

 Mortality heavy. 

 Extreme paucity of Nosema in bees while this 



mortality in progress. 

 Nosema fluctuations at different stages. 



4. A particular case, 

 E14, in detail. 



(5) Effect on Apiary as a ivhole. No more than two stocks ever displayed 

 symptoms at one time or in succession. During this period the apiary 

 contained various races and strains of bees. 



