142 



cross-fertilization or the changes induced thereby. Crozier * 

 writes (Cross between Stowell's Evergreen and YeUow Hath- 

 away): "These observations show that foreign pollen effects 

 the appearance of the crossed kernels the first season, but 

 also that an unusual appearance may be due to a cross of the 

 pievious year. Prof. Beal^ says: "During the year past I 

 planted near each other three hills of the following kinds of 

 corn, well mixed together, viz.: Waukashum, White Flint, 

 Black Pop Corn, Early Minnesota Sweet, King Phillip and 

 Black Sugar. Every ear showed a mixture produced by 

 pollen from one or more of the varieties except those of the 

 King Phillip variety." 



But flint corn^ did not show the effect of pollen from 

 dent corn in the first year. Kellerman and Swingle' who 

 crossed a large number of varieties have come to the same 

 conclusion that other observers have; namely, that the so- 

 called varieties of maize cross more or less freely, and the 

 effects may or may not be visible the first year. As a result 

 of some work done on the college grounds Professors Crozier 

 and Rolfs* write concerning the immediate influence of cross- 

 fertilization upon the fruit : "In ail cases some, and in some 

 cases all of the ears changed in appearance in the direction 

 of the variety furnishing the pollen." A practical gardener, 

 Mr. F. S. White,^ writes as follows: "The past season I had 

 sixteen varieties of white sweet corn, and also a small lot of 

 Black Mexican. When I came to save my seed corn I found 

 grains of this black corn stuck in every variety." 



4 Proceeding's Soc. Prom. Agrl . Science 18S7, p. 1. 



5 Keport State Board of Agriculture, Michigan, 1879, p. 198. 



6 Beal : Report State Board of Agriculture, Michigan, 1878, p. 450. 



7 Second Annual Report Kas. Agrl. Exp. Station, 1889, p. 388. See alse First 

 Annual Report, p. 316. 



8 Agricultural Science, Vol. IV. p. 23. 



9 Iowa State Register, December 11, 1891. 



