268 



trees seeing how thoroughly Mr. Derry has numbered them: rather, 

 a fault lay in neglecting to verify the written record after it had 

 been made ; and it is fortunate that it is no more, for had wrong 

 trees been tapped the result would have been to render of little value 

 the present attempt at constructing the past tapping-history of each 

 tree. Instead the writer believes that he has been furnished with 

 a fairly accurate record of how each of his possible seed-parents has 

 been bled in the past. To have this knowledge is especially important 

 if it be true that tapping interferes with the germinative power and 

 perhaps other functions of the seed. In any case the knowledge of 

 what has happened to the trees is a desirable adjunct to the work 

 now in hand. 



The following tables bring into one view the tappings as far as 

 Renown. There are in all 156 variations, which can be briefly expressed 

 by symbols. The serial tappings under Mr. Derry, Mr. Boden Kloss, 

 Mr. Fox and Mr. Main are denoted in them by consonants thus: — 



B. Denotes experiment l of 1904 and the rotation tappings 



which followed it. 



C. Denotes experiment 2 of 1904 and the rotation tappings 



which followed it and also the incompletely recorded 

 experiment 2 of 1908. 



D. Denotes experiment 3 of 1904 and the rotation tappings 



which followed it 



F. Denotes experiment 4 of 1904, the rotation tapping which 



followed in 1905, the experiment 4 of 1906, and the sub- 

 sequent rotation tappings. 



G. Denotes experiment 5 of 1904, the rotation tapping which 



followed in 1905, the experiment 5 of 1906 and the sub- 

 sequent rotation tappings. 



J. Denotes the experiment 6 of 1904, and the rotation tap- 

 pings which followed in all subsequent years. 



K. Denotes the experiment 7 of 1906 and of 1907 and 1910 

 with the subsequent rotation tappings. 



M. Denotes the experiment 8 of 1909 and the subsequent 

 rotation tappings. 



N. Denotes the rotation tappings which were called "experi- 

 ment 9" from the year 1909. 



P. Denotes the rotation tappings which were called " experi- 

 ment 10 " from the year 1910. 



