532 EXPERIMENT STATION EECORD. [Vol.38 



A cross between the homozygous variegated race and the colorless race gave 

 Fi ears of the variegated type, with a segregation in Fa. One ear higher in 

 grade than the Fi and several ears of the pattern type were obtained, together 

 with a number of ears of the two parental types. 



The author concludes that the types for pericarp color were self-red, varie- 

 gated, pattern, and colorless, and that all but the variegated selections were 

 homozygous for these characters. The failure of the variegated selections to be 

 homozygous in respect to the range of variation is explained by an hypothesis 

 of slight germinal variations. Fi'om a study of the relation of these various 

 pericarp characters in crosses between the various homozygous types, it is 

 suggested that certain combinations produce germinal instability, and the 

 conclusion is arrived at that the factors for self-red, variegated, pattern, and 

 colorless pericarp form a series of multiple allelomorphs. 



The relation of cob to other ear characters in corn, A. E. Grantham {Jour. 

 Amer. Soc. Agron., 9 {1911), No. 5, pp. 201-217, pi. 1).—A statistical study of 

 certain correlations existing between the cob and other ear characters is re- 

 ported, as conducted at the Delaware Experiment Station from 1910 to 1915. 

 The data were obtained from 3,500 ears in investigations made to determine 

 the relation between the physical characters of ears to the vigor and yield of the 

 plant. The conclusions arrived at may be briefly summarized as follows : 



The yield of grain per ear is strongly correlated with circumference of cob. 

 Practically no correlation exists between weight of individual kernels and cir- 

 cumference of cob. Depth of kernel and thickness of kernel are correlated to 

 a moderate degree with cobs of small circumference. Yield of grain per ear 

 is con-elated to a considerable degree with weight of cob. Weight of kernel 

 is moderately correlated with cobs of low weight. A very low correlation exists 

 between depth of kernel and weight of cob, the heaviest cobs not carrying the 

 deepest kernels. A fair degree of correlation exists between thickness of kernel 

 and cobs of low weight. Yield of grain per ear has a very slight correlation 

 with low density of cob. A moderate degree of correlation exists between weight 

 of kernel and cobs of low density. Depth of kernel is slightly correlated with 

 density of cob. The correlation between thickness of kernel and density of cob 

 is very low and negative. The coefficient of variability is much higher for 

 weight and density of cob and weight of kernel than for the other characters. 



Variety tests of corn, R. Y. Winters and J. H. Hall, jk. {Bui. N. C. Dept. 

 Agr., 38 {1917), No. 2, pp. 3-23, figs. 2). — Tabulated data are presented showing 

 the results of tests with 42 varieties of corn at six experimental centers in 

 North Carolina, giving the yields for 1916 and average yields for 1914, 1915, 

 and 191G, inclusive. Additional data show the relative value for silage of a 

 number of the varieties tested at five centers. The older varieties Marlboro, 

 Biggs Seven-Ear, Weekley Improved, and Cocke Prolific are reported as giving 

 good results, while promising new varieties which have only been tested a few 

 years include Latham Double. First Genei'ation Cross No. 182, and Jarvis 

 Golden Prolific. 



Salting soft corn, H. D. Hughes {Iowa Sta. Circ. Ifl {1917), pp. 7).— Tests 

 of salting down corn of varying degrees of maturity indicated that the salt was 

 of considerable value in retarding fermentation and the development of molds 

 and in reducing heating in soft corn. In cribbing soft corn from 0.5 to 1 lb. 

 of salt per 100 lbs. of soft corn may be used to advantage, the amount depending 

 somewhat upon the condition of the corn. The necessity of adequate ventila- 

 tion of corn stored in the crib is indicated. 



On the inheritance of the number of teeth in the bracts of Gossypium, 

 S. C. Harland {West Indian Bill., 16 {1917), No. 2, pp. 111-120, figs. 7/).— Gen- 

 eral notes are given on bract teeth in cotton, and observations of the first genera- 



