32 INSECT TRANSFORMATIONS. 



that the accident occurred in 1709, so remarkable for 

 a severe frost. '* With these facts before us, we think 

 the introduction of the seed of the mould into the cen- 

 tre of the apple by no means so unaccountable as at 

 first view it appeared. Be this as it may, we tried, 

 with the seed gathered from this apple-mould, similar 

 experiments to those of Spallanzani, with results pre- 

 cisely similar to his; and being in this way able at 

 pleasure to produce mould of the same species by 

 sowing, we are entitled to conclude that all mould 

 arises from seed, otherwise nature must produce the 

 same effect from dissimilar causes, which is contrary 

 to the first principles of sound philosophy. | 



* Conv. on Veg. Physiol., i, 59. t J. & 



