PLANNING A NEW PLANT 



To instill good qualities of fruit into the 

 inferior original berry, it was necessary to cross 

 with the large and well flavored Lawton black- 

 berry. 



The immediate result was seemingly to oblit- 

 erate the white-fruiting tendency altogether. 



But a wide experience of similar instances led 

 me to continue the experiment, which for the 

 moment seemed to be carrying me away from my 

 ideal of a white blackberry; and the principle of 

 reversion came to my aid in the next generation 

 and gave me, as will be recalled, a berry that 

 combined the light color of one of its grand- 

 parents with the size and flavor of the other. 



I have already suggested that it aids the 

 memory, and helps to give tangibility to the facts, 

 to recall the Mendelian phrase which speaks of 

 blackness versus whiteness in such a case as 

 constituting a pair of unit characters; naming 

 blackness as the dominant and whiteness as the 

 recessive feature; and which gives us assurance 

 that a fruit which shows the recessive character 

 of whiteness in the second generation will there- 

 after breed true, thus affording us evidence of 

 definite progress toward the ideal of our experi- 

 ment. 



AID FROM UNIT CHARACTERS 



As the principles that govern these cases are 



[25] 



