350 



RAYMOND PEARL. 



YELLOW STARCHY 



YELLOW SWEET 



WHITE STARCHY 



WHITE SWEET 



10 



I II III IV V VI VII VIII IX X XI XII XIII XIV 



FIG. 4. Diagram showing the count of the different observers of each of the 

 four classes of kernels for ear No. n. 



personal "equation" or bias of each individual observer. As a 

 matter of fact it was possible (and this was done) to make a 

 perfectly graded series of either starchy or sweet kernels from a 

 single ear which ranged from pure white at one end to pure deep 



