246 SYSTEMATIC POMOLOGY 



exercise is to require each student to prepare 

 the synonymy of certain varieties. Suppose 

 there are five varieties of plums which he has 

 described. Do not let him rest with one 

 name for each, Make him find all the names 

 for each, and then let him determine which 

 are the correct ones. 



A very effective laboratory exercise consists 

 in handing each student some nursery cata- 

 log, and assigning him to a verification and 

 correction of the nomenclature. 



Practical laboratory exercises in the classi- 

 fication of fruits are usually difficult to ar- 

 range. It is hard to get varieties enough 

 at any one time to make classification really 

 possible. Something can be done, however, 

 even with a few varieties; and the teacher may 

 always bear in mind that though the student's 

 imperfect classifications may not advance the 

 science of pomology at all, they may help 

 greatly in developing the student himself. 



Those teachers who have considerable col- 

 lections of casts of fruits properly colored 

 can probably use them to advantage for exer- 

 cises in classification. Furthermore, since 

 the classification of many fruits depends on 

 leaf and twig characters, much use can be 



