VEGETABLE PHYSIOLOGY. 131 



once discovered that it will grow, you may not 

 insert a rose-bud into the bark of an oak, with 

 an equal chance of success. This subject is 

 absolutely necessary for you to understand, if 

 you wish to become a good gardener, and to 

 reap all the instruction and amusement which 

 is to be derived from attending to your own 

 garden. But it is too long for this present 

 letter, and I must defer my intention to some 

 other opportunity. 



G. 



