8 GENETICS [Bot. Absts. 



41. Htjtcheson, T. B., and T. K. Wolfe. Relation between yield and ear characters in 

 corn. Jour. Amer. Soc. Agron. 10:250-255. Sept., 1918.— Authors find correlation between 

 yield and many points emphasized on the score card. Yield is positively related to length, 

 average circumference, both of ear and cob, uniformity of exhibit, shape of ears and trueness 

 to type, character of tips, uniformity of kernels, shape of kernels, and size of germ. — Ears of 

 Boone County White for planting were selected at random. Correlations as obtained are 

 based on comparison for seasons 1916 and 1917, of 10 or 12 high- versus 10 or 12 low-yielding 

 strains. — R. J. Garber. 



42. Jaffe, H. [Rev. of: Dresel, K. Inwiefern gelten die Mendelschen Vererbungsge- 

 setze in der menschlichen Pathologie? (To what extent do Mendelian laws of heredity hold in 

 human pathology?) Virchows Arch. 224: 256 p. 19— ] Zentralbl. Physiol. 33 : 286-287. 1918. 



43. Johnson, James, and R. H. Milton. Strains of white Burley tobacco resistant to 

 root rot. U. S. Dept. Agric. Bull. 765. 11 p., 4 fig- A P ril 18 > 1919.— A semi-popular discus- 

 sion of the results obtained in Kentucky from the use of strains of White Burley tobacco 

 (Nicotiana tabacum) resistant to the root-rot disease (Thielavia basicola). The tests carried 

 on for three years in Kentucky have shown that greatly increased yields can be obtained on 

 infested poils by the use of resistant strains. The quality of these strains does not seem to be 

 inferior to the ordinary strains grown. The importance of the disease is discussed and resist- 

 ant strains recommended where growers suspect the disease to be present. It is poi nted out 

 that the well established practice of growing only two crops of tobacco in succession in the 

 Burley district as compared with continuous culture in some other sections where other varie- 

 ties are used has come about largely as a result of the extreme susceptibility of the White 

 Burley variety to the root-rot disease. [See Bot. Absts. 3, Entry 403. [— L. R. Jones. 



4A. Johnson, Roswell H. The determination o c disputed parentage as a factor in reduc- 

 ing infant mortality. Jour. Heredity 10: 121-124. Mar., 1919.— See Bot. Absts. 3, Entry 1006. 



45. Ktjiper, K. [Rev. of: Haecker, Valentin. Entwicklungsgeschichtliche Eigen- 

 schaftsanalyse (Phanogenetik) . Gemeinsame Aufgaben der Entwicklungsgeschichte, Verer- 

 bungs- und Rassenlehre. [Embryological analysis of characters (Phaenogenetics). General 

 results of embryology, genetics and eugenics.] 8 vo, 344 P-, 181 fig. G. Fischer: Jena, 1918.] 

 Genetica 1: 164-170. Mar., 1919.— See also Bot. Absts. 1, Entry 1216. 



46. Lehmann, Ernst. Uber reziproke Bastarde zwischen Epilobium roseum und parvi- 

 florum. [Reciprocal hybrids between Epilobium roseum and parviflorum. Zeitschr. Bot. 10 : 

 497-511. 7 fig. 1918.— See Bot. Absts. 3, Entry 266. 



47. Lehmann, Ernst. Uber neuere Oenothera-arbeiten. [Recent works on Oenothera.] 

 Zeitschr. Bot. 10:517-551. 1918. 



48. Lehmann, Ernst. [Rev. of: Stout, A. B. Fertility in Cichorium Intybus: Self- 

 compatibility and self-incompatibility among the offspring o self-fertile lines of descent. Jour. 

 Genetics 7: 71-103. Feb., 1918. (See also Bot. Absts., 1, Entry 243.)] Zeitschr. Bot. 10: 

 551-552. 1918. 



49. Leightt, C. E., and T. B. Hutcheson. On the blooming and fertilization of wheat 

 flowers. Jour. Amer. Soc. Agron. 11: 143-162. 2 fig. 1919. 



50. Lippincott, William A. The breed in poultry, and pure breeding. Jour. Heredity 

 10:71-79. Fig. 10-16. Feb., 1919.— See Bot. Absts. 3, Entry 1011. 



51. Lombarteix, Jean Marie. Les semis comme moyen de combattre la degenerescence 

 de la pomme de terre. [Seeds as means of combatting degeneration in the potato.] Rev. Hortic. 

 90: 170. Oct., 1918.— See Bot. Absts. 3, Entry 645 



