32 INSECT TRANSFORMATIONS. 



This heino- covered with ninety-one layers of wood, 

 indicated that the accident occjirred in 1709, so re- 

 markable for a severe frost*.'* With these facts 

 before us, we think the introduction of the seed of 

 the mould into the centre of the apple by no means 

 so unaccountable as at first view it appeared. Be 

 this as it may, we tried, with the seed g-athered from 

 this apple-mould, similar experiments to those of 

 Spallanzani, with results precisely 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 moidd arises from seed, other- 

 wise nature must produce the same effect from dis- 

 similar causes, which is contrary to the first principles 

 »»f sound philosophy t- 



* Coiiv. on Veg. Physiol, i. 59. f J. R» 



