134 EXPEEIMENT STATION RECORD. 



difference being the way in which the individuals are combined. To secure 

 the most accurate comparison of the yield of the four ears, one seed from each 

 of the ears was planted in each hill. The different kinds were identified by 

 their relative position in the hill." 



The figures in the following table express average percentages of the mean of 

 the four kinds : 



Yield and height of tico varieties of sweet com and hybrids between them. 



Variety of corn. 



Yield. 



Height. 



Egyptian 



Voorhees Red 



Egyptian+Voorhees Red. 

 Voorhees Red+ Egyptian. 



Per cent. 



112.8±4.6 

 55.6±4.0 

 89.0±5.1 



142.8±4.3 



Per cent. 

 111.3±1.0 

 84.0±0.9 

 100.0±1.2 

 103. 0± 1.1 



Further data give the height, number of suckers, total number of leaves, 

 exsertion of tassel, length of axis of tassel, length of central spike, number of 

 primary branches in tassel, number of secondary branches in tassel, length of 

 longest leaf, number of nodes above longest leaf, and number of nodes above 

 the ear of the above-named varieties and their hybrids. 



Inheritance of endosperm texture in sweet X waxy hybrids of maize, G. N. 

 Collins and J. H. Kempton {Amer. Nat., ^8 (,191Jt), No. 574, PP- 584-59Jf, fig. 

 1). — This continues the report of work previously noted (E. S. E., 29, p. 35), 

 which covered the first and second generations. " The third generation, like the 

 second, gave results sufiiciently close to dihybrid ratios to render unprofitable 

 the assumption of more complicated ratios. There are, however, deviations 

 from the expected numbers of too great magnitude to be ascribed to chance. 



" The ratios of waxy to nonwaxy seeds were regular as far as the conditions 

 of the experiment could determine, except for a slight excess in the number 

 of waxy seeds in nearly all the ears in which all three classes appeared. A 

 deviation in number of waxy seeds as large as that shown in the total would 

 not be expected to occur as the result of chance more often than once in 1,000 

 times. The ratios between sweet and homy, while approximating the predicted 

 ratios, show numerous irregularities. Wherever there is a significant deviation 

 in the number of sweet seeds, the observed number is below the expected. Rea- 

 sons are advanced for believing that the deficiency of the sweet class may 

 result from a failure of some sweet seeds to develop a wrinkled exterior rather 

 than from any iregularities in segregation. 



" The results show the value of representing the characters by gametic factors. 

 This method provides an orderly arrangement of the facts of heredity thus far 

 observed with respect to these characters, and makes possible fairly accurate 

 predictions regarding the genetic behavior of the various seed classes." 



Corn growing' in Montana, M. L. Wilson {Montana Sta. Circ. Jfl (1914), PP- 

 49-7.'f, figs. 31). — This circular is addressed primarily to those who have had 

 some experience with corn and desire information upon the methods which they 

 should practice in Montana. The difference between Montana and eastern and 

 southern corn growing is brought out in the discussions on culture, eradication 

 of the Russian thistle, harvesting, stacking, threshing, and the preparation of 

 corn stubble for small grain. The group characteristics of early flint, early 

 dent, semident, late flint, and late dent varieties of corn are given. 



The successful use of the ordinary threshing machine for threshing the Mon- 

 tana type of the dry crop as it comes from the field or stack is noted. The 

 resulting products are shredded fodder, cobs, and shelled corn. 



