EXrERHFENT STzVTIOX REPORT. 437 



This shows that the bhick is dominant over tho yellow in the ratio 

 that closel}' agrees with the theoretical numbers that one obtains 

 under Mendel's law. 



The mixed grains, while few, are interesting. Some of them are 

 without any color ("white"), while others are mottled black and 

 yellow, and a few are pale lead color. An occasional grain has the 

 dark color only upon one edge or flat side, as if the black and yellow 

 pigments had not been thoroughly mixed together. 



Notes upon ''Rabj" Sweet Corn. 



In 1904 the "Ruby" was grown as No. 76 in the list of sweet 

 corns, and the record shows that its yield was poor, only four fair- 

 sized ears being obtained, averaging four and one-half inches in 

 length. It is one of the late kinds, and, as the name suggests, has 

 the cob and husks of a rich, reddish purple. Upon one of the ears 

 were four yellow flint grains, and these were planted by themselves, 

 far from any other sweet corn. Soon after the plants were up it was 

 noticeable that two of them were red in stem and midrib of leaf, 

 while the other two had the green color throughout common to ordi- 

 nary corn. 



The only yellow flint coi-n grown in the set the previous 3'ear was 

 the "Bryant." It was No. 7, and therefore 180 feet distant from the 

 *'Ruby," and it is assumed that the grains planted in isolation this 

 season were a cross of the "Bryant" upon "Ruby." 



The "Bryant" is "a small, eight-rowed, early yellow flint," as the 

 record runs, and is therefore a sharp contrast with the "Rub}'," with 

 white, wrinkled gi-ains — a true sweet corn — "easily distinguished' by 

 its deep purple husks, sheaths and cob." 



A count of the grains upon a small ear from a stalk of the "Ruby" 

 type of plant showed 44 white grains and 148 yellow kernels. Accord- 

 ing to the Mendel principle of heredity, the theoretical number of 

 white grains is 48 and of yellow anes 144. 



A week later (September 2d) an ear was taken from the other 

 *'Ruby" plant, which plant was larger — fully seven feet tall — and, like 

 the former, red throughout, including tassel and silk, excepting only 

 the main portions of the leaf blades, which were of nearly the usual 

 shade of green. This second ear was seven inches long, eigh teen- 

 rowed and well filled out. 



The following is the count of grains according to the color and 

 texture : 



