The data presented pertain to problems met in determining relative amounts of ear rot in strains of corn. The first study involved methods of measuring ear rot in field samples. The percentage of ears rotted was determined by count in each of 37 hybrids and varieties from 50-hill populations, or approximately 125 ears for each entry. The percentage-age of rotted kernels in the shelled grain from the same samples then was determined, using 200- to 300-gram samples for analysis. A comparison of the results from the two methods of determining ear rot in these identical samples showed the ear separation method to have given very inaccurate results, the coefficient of correlation between the two methods being only + 0.40. A modification of the ear separation method involving the determination of the percentage of rot by weight gave more efficient results as indicated by a coefficient of correlation of + 0.62. In the latter method the completely rotted ears and the rotted portions only of the partly rotted ears were included in the rotted separate. Bleached and otherwise doubtful looking ears were broken to determine whether they were internally rotted. The results from the experiments illustrate the difficulty of measuring accurately the amount of ear rot on a basis other than by the kernel separation method.

The purpose of this study was to determine the mode of inheritance of petal color, seed color, cilia on the false septa of the bolls, and seed size. White petal color behaved as a simple Mendelian recessive to blue, although a deficiency occurred in the recessive class which was too great to be attributed to chance. It was calculated that 33.8%, of the possible white-flowered segregates failed to reach the flowering stage. Lower viability of the mature seed, or of the plants before flowering, or of both could account for a deficit of 21.9% of the recessive plants. No data were available for determining the cause of the remaining deficit. The production of color in the seed coat was dependent upon the same gene which determined the production of color in the petals or upon a gene closely linked with the flower color gene. The two varieties were differentiated by a single factor pair with intermediate dominance for the production of cilia on the false septa. This gene was inherited independently of the petal color gene. Seed size was dependent upon multiple factors. The number of factors could not be determined, although segregates of both parental types were obtained among 350 F2 plants. Large seed size was partially dominant over small. A correlation coefficient of .684 was obtained between the weight per 50 seeds of the F2 plants and the mean weight of their F3 progeny. No linkage could be demonstrated between major seed size genes and the genes responsible for petal color and cilia on the false septa.

(1) The distribution of sulphur was determined in the tissues of three groups of young rats. One was fed a modified Osborne-Mendel low protein basal diet, one the basal diet supplemented with 0.8 per cent. of elementary sulphur, and the remaining one the same supplemented ration plus orange juice ad libitum. Sulphur feeding increased especially the total sulphur content of the lung and spleen. Next in order came the heart and kidney. The total sulphur content of the lung of the sulphur group was 170.2 and of the spleen 149.8 mgm. more per 100 gm. dry material than the content of the respective tissues taken from the control group. The average increase in the amount of sulphur in the heart and kidney was about half of the average increase in the lung and spleen. On the whole less sulphur was stored in the tissues of the sulphur group that received orange juice in addition, but the differences are too small to warrant any definite conclusions. (2) The distribution of various forms of sulphur in the tissues of two groups of adult rats, one fed the stock ration, the other the stock ration supplemented with 3 per cent. elementary sulphur, was also determined. Sulphur feeding likewise increased the total sulphur content of the heart, spleen and lung but not so much of the kidney. The three former organs contained, respectively, 81.0, 61.0 and 57.9 mgm. more sulphur per 100 gm. dry material than the same organs taken from animals raised on the stock ration alone. (3) Sulphur feeding had little effect upon the sulphate content of rat tissues, thus substantiating the observation of Denis and Leche (1925b). The only tissues in which the sulphate content was slightly increased were the kidney, spleen and blood. The respective tissues of the sulphur fed animals contained 20.63, 8.55 and 8.27 mgm. more sulphate sulphur per 100 gm. dry material than the same tissues taken from the control animals. (4) There was found to be no difference in the concentration of volatile sulphide in the tissues of animals fed rations with and without the addition of flowers of sulphur.

This treatise on the Negro and crime in Virginia was begun in 1926, with the expectation that it would be completed within a year. It was not anticpated that there would be the difficulty which was later experienced in finding first hand information on the subject. It was discovered that the courts in very few instances had separate records for Negroes. The 1920 federal census figures were considerably out of date. Moreover, the effects of the Prohibition statutes upon Negro crime were just beginning to be analyzed. The first answers of judges and clerks to a questionnaire were tardy in appearance and disappointing in content. It was finally determined to await the appearance of the 1930 federal census figures and of later prison reports before attempting to draw any conclusions upon so delicate a topic as Negro criminality. -- Preface.

The mechanical analyses of a large number of cropping and virgin surface and sub-surface soils of the southern high plains were determined and compared with the sand, silt, and clay contents of the soil drifts. The greatest difference between drift material and the cropped and virgin surfaces occurred in the coarse- and medium-textured types. The drifts contained an average of 37.8% less, silt and clay and 29.3% more sand than the adjacent virgin soil. It was also found that the increase in percentage of sand in the drifts was of proportion to the amount of silt and clay removed by the wind shifting the soil. The sand + silt/clay ratios in these soils were compared to that in the drifts. The drift from the coarse-textured soils had the highest clay ratios and the clay soils the lowest; However, the data reported seemed to indicate that there was very little relation between the clay ratio and wind erosion.

IN view of the importance of the exact knowledge of stiffness in individual yarns and yarn combinations, a method has been developed for measuring these characteristics quantitatively. It consists essentially in determining the force necessary to bend a piece of yarn, held at one end, through various angles. For convenience in the application of the force, the yarn is formed into a U-bend, the load being applied at the center of the U. The bending angle is variable by means of a turning device. The instrument is used in conjunction with am analytical balance. The method described lends itself to a great many different applications. Among others, the load-versus-deflection characteristics for various types of yarn have been determined. The influence of the number of filaments and proper sizing upon the stiffness is shown, as is the hysteresis effect. The method lends itself to the determination of the modulus of clasticity.

Different quantities of sulfuric acid and sulfur were added to the surface 5 inches of a Lufkin fine sandy loam in 18-inch tiles, and the pH values of samples of the soils from different depths were determined at intervals over a 5-year period. Maximum acidity of the surface soil developed within 10 weeks and that of the next 2 or 3 inches within 4 months after treatment. Acidity of all treated soils then slowly decreased. Penetration of acidity in excess of 2 or 3 inches occurred only in series in which the surface soil became so acid that no plant growth could occur. The presence of free sulfuric acid and soluble salts in the soil solution was evident from the pH values secured. Increases in exchangeable hydrogen at the end of 5 years were equivalent to an average of about 60% of the acid added. The remainder of the acid must have reacted with non-exchange compounds in the soil, including bases made available by weathering. Single applications of acid to the surface soil is not a practical method for acidifying the subsoil for the control of plant diseases.