GRAFTING EMBRYOS. 383 



as they advanced in growth, ended by becoming 

 half incorporated, notwithstanding they ended by 

 finally becoming a twin fruit, consisting of two very 

 unequal halves. In the smaller fruit four cells for 

 seeds were formed, but in the larger but three. In 

 other respects the structure was complete, but each 

 was furnished with a vein of elevated lines on the 

 side next the junction. The nature of these is 

 unknown to us. What is particularly deserving 

 of attention here is, that the hairy surface of the 

 young apple offered no obstacle to the junction in 

 question; possibly it took place before the hairs 

 were formed. It remains to be proved by practice, 

 but certainly appears a possible, but exceedingly 

 difficult operation." 



