18 Proceedings of the Royal Physical Society. 
sip the dew on the grass. When the chyle-stomach of the new host is 
reached, an amceba escapes from the spore, penetrates one of the cells of the 
gut-lining, and starts to grow at the expense of the cell. Two or more 
parasites may enter the same cell, but even one by repeated subdivision 
may fill the cell with spores. 
II. Some EXPERIENCES IN LEWIS, OUTER HEBRIDES. 
Specimens were first sent to Cambridge from Lewis in October 1911, at 
the time of the second outbreak of disease in the Island. The specimens 
were from two stocks, and these are Nos. 54a and 540 in the table on 
page 47 of the 1912 report. Dr Graham-Smith examined these himself 
and reported “many young stages” of Nosema. Destruction of both stocks 
was advised, but they were watched for a few days longer, and only one 
was killed. The other, a colony of American Golden Bees, completely 
recovered, wintered in excellent order, and never again displayed crawling 
symptoms. A stock which “crawled” during the following January was 
found by Dr Graham-Smith to contain Vosema in all stages. It was allowed 
to die out, and became extinct on 29th February. In the summer of 1912 
another stock displayed “crawling” in a very marked degree. Specimens 
were sent to Dr Graham-Smith, and finally, in July, the remnant of the 
stock, with combs, was despatched to Cambridge. They were kept for some 
time there, and in those which died Dr Graham-Smith found “nothing 
very special.” ) 
In June 19138, there was in Stornoway a very typical case of Isle of 
Wight Disease. The stock affected was at full strength, crowding ten 
standard combs, and fully occupying a section crate of the usual size. The 
crawling bees could be found all over the garden on a fine day, and the other 
symptoms of the disease were very marked, A number of the “crawlers” were 
examined for Nosema, but no spores were found. Specimens (“crawlers ”) 
were sent as usual to Dr Graham-Smith. Dr Porter, who had now been 
entrusted with the work, made the following report with regard to the 
specimens sent: “The bees examined contained some young stages of the 
parasite. One had a very few spores. There is no doubt that Nosema exists 
in them, at any rate in some, which act as parasite carriers.” | 
I was much interested to learn from this report that Nosema could not 
always be found in “ crawling” bees, because this agreed with my experience 
in Lewis. by this time I had examined a large number of bees for spores 
of Nosema, and the result had been surprising. I had no difficulty in 
getting the spores, but these were found in bees which appeared perfectly 
healthy rather than in bees which were displaying symptoms of Isle of 
