30 Proceedings of the Eoyal Physical Societ3^ 



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

 E14. „ 2 weeks „ „ ,, 



KM. „ 3J 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 013. 



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 Wiffht 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. 

 El 4. June to beginning of winter, and died out. 

 Gp. July to winter, died out. 



ri4. 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 stucks, one of which 



completely recovered. 



3. Healthy stocks known to have Nosema 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. 



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



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

 contained various races and strains of bees. 



4. A particular case, 

 E14, in detail. 



