No. 2, September, 1920] GENETICS 203 



1541. JOHNSON, James. An improved strain of Wisconsin tobacco. Connecticut Havana 

 No. 38. Jour. Heredity 10: 2,81-288. Fig. 8-10. June, 1919. 



154'2. Jones, D. F., andW. O. FlLLEY. Teas' hybrid catalpa. An illustration of the greater 

 vigor of hybrids; increased growth and hardiness as a result of crossing; illustrating definite 

 principles of heredity. Jour. Heredity 11: 16-24. 6 fig. Jan., 1920. 



1543. Jones, D. F. Selection in self-fertilized lines as the basis for corn improvement. 

 Jour. Amer. Soc. Agron. 12: 77-100. 1920. — Selection in self fertilized lines makes possible 

 a reliable estimation of hereditary values of both sexes and is suggested for corn improvement. 

 — F. M. Schertz. 



154*1. Kappert, H. Uber das Vorkommen volkommener Dominanz bei einem quantitativen 

 Merkmal. [The occurrence of complete dominance in a quantitative character.] Zeitschr. 

 indukt. Abstamm. Vererb. 22: 199-209. 1 fig. Mar., 1920. 



1545. Kempton, J. H. Heritable characters of maize. III. Brachytic culms. Jour. He- 

 redity 11 : 111-115. 4 fig. Mar., 1920. 



1546. Klatt, B. Experimentelle Untersuchungen iiber die Beeinflussbarkeit der Erban- 

 lagen durch den Korper. [Experimental investigations on the modifiability of the hereditary fac- 

 tors through the soma.] Sitzungsber. Ges. Naturf. Freunde. 1919: 39-45. 1919. — Writer experi- 

 mented with three races of gypsy moth (Lymantria dispar). The caterpillars of one of these 

 had an unusuall}' broad yellow stripe along the back, dominant on the whole over the narrow 

 yellow stripe of the normal race. The third race had a black longitudinal stripe, dominant 

 over yellow and normal and clearly differing by a unit factor. He extirpated the ovaries of 

 individuals dominant in one or both factors (yellow or black) and transplanted in their place 

 ovane? from recessive individuals. These females were mated with recessive males. The 

 caterpillars appeared to be pure recessives, showing no trace of the dominant characters of 

 the foster mothers. [See also Bot. Absts. 5, Entry 1579.]— Sewall Wright. 



1547. Klatt, Berthold. [German rev. of: Durken, Bernhard. Einfiihrung in die 

 Experimentalzoologie. (Introduction to experimental zoology.) 16 x 23 cm., x + 446 p., 224 fig- 

 Julius Springer: Berlin, 1919.] Zeitschr. indukt. Abstamm. Vererb. 22: 275-276. May, 

 1920. 



154S. Klatt, B. [German rev. of: (1) Palmgren, Rolf. Till Kannedomen om Abnormi- 

 teters Nedarfning hos en del Husdjur. (Inheritance of abnormalities in certain domestic 

 animals.) Acta Soc. pro fauna et flora fennica 44: 1-22. 1918. (2) Palmgren, Rolf. Tvenne 

 bastardei mellan getbock och fartacka, fodda i Hogholmes zoologiska tradgard. (Two hybrids 

 between sheep and goats produced in Hogholm zoological gardens.) Med. pro fauna et flora 

 fennica 44: 124-125. 1918.] Zeitschr. indukt. Abstamm. Vererb. 22:283-284. May, 1920. 



1549. Klatt, B. [German rev. of: Pezard, M. A. Transformation experimental des 

 caracteres sexuels secondaires chez les Gallinaces. (Experimental transformation of secondary 

 sexual characters in Gallinaceae.) Compt. Rend. Acad. Sci. Paris 160: 260-263. 1915.] Zeit- 

 schr. indukt. Abstamm. Vererb. 22: 284. May, 1920. 



1550. Koch, L. Verdere Onderzoekingen betreffende de praktijkwaarde van de lijnen- 

 selectiemethode, mede in verband met het gemengd planten van varieteiten. [Further obser- 

 vations on the practical value of the line-selection method and a comparison of it with the mixed 

 planting of varieties.] Teysmannia 29: 389-123. 1918. — Author has made comparative tests 

 of planting in (a) pure lines, (b) mixed populations and (c) populations made up of definite 

 mixtures of pure lines of the following crops: rice, katjang tanah, kedelee, corn, potatoes, and 

 cassave, and finds that in rice and katjang, line selection gives no satisfactory results. Vari- 

 eties of rice when in mixed plantings influence each other greatly. The results of such 



