472 TRANSMISSION 



Summary. Correlation is generally a relative matter, and 

 impressions are exceedingly deceptive. Nothing but actual cal- 

 culation will show the extent to which characters really move 

 together, and the importance of this knowledge is ample recom- 

 pense for all the labor involved. As will be seen later, the same 

 methods give us the only reliable measure of heredity. 



SPECIAL EXERCISES 



Again let the student actually do the work of finding correlation coeffi- 

 cients until he acquires facility in operation and a distinct conception of 

 what is involved. 



ADDITIONAL REFERENCES 



CORRELATION IN RYE. Experiment Station Record, XIII, 241, 641. 

 CORRELATION IN THE PARTS OF CORN. By A. A. Brigham, Gottingen. 



Experiment Station Record, VIII, 486. 



CORRELATION IN WHEAT. Experiment Station Record, IX, 553. 

 CORRELATION MATHEMATICS. Science, XXII, 309-312. 

 CORRELATION OF CHARACTERS IN CORN. (German.) Experiment Station 



Record, XVI, 461. 

 CORRELATION OF SEEDS AND COLOR OF FRUIT. Experiment Station 



Record, XI, 932-936. 

 CORRELATION OF THE MENTAL AND PHYSICAL CHARACTERS IN MAN. 



By Alice Lee and Karl Pearson. Proceedings Royal Society, LXXI, 



106-114. 

 CORRELATION THEORY. Science, XXI, 32-35. 





