No. 1, July, 1920] CKNKTK s l.'il 



820. Westi'iial, A. t)ber familiHre Myoklonia und iiber Beziehungen derselben zur Dys- 

 trophia adiposo-genltalis. [On familial myoclonia and on its relation to dystrophia adiposa- 

 genitalis.] Dcutsch. Zeitschr. Nerven. 58: 1918. 



821. WlGGANS, C. C. Some factors favoring or opposing fruitfulness in apples. Missouri 

 Agric. Exp. Sta. Res. Bull. 32: 1-G0. 6 fig. 1918. 



822. WlTTB, Hbrnphid. Sjalfbefruktningens inverkan pa afkommans utveckling hos 

 tlmotejen. [Effect of inbreeding on the development of progeny in timothy.] Sver. I't-ilesf. 

 Tidskr. 29: S0-90. 1919. — Timothy is usually cross-pollinated. When individual plants or 

 heads are isolated only a very few seeds are formed, showing partial self sterility. The prog- 

 eny from selfed seed when compared with their vegetatively propagated parent plant showed 

 an average decrease of 15 to 35 per cent in height and 20 to G5 per cent in dry weight. Only 

 rarely did any progeny plant equal its parent in vigor. Open-pollinated progeny showed no 

 significant deviation from the parent. — E. G. Anderson. 



823. Witte, Hernfrid. Breeding timothy at Svalof. Jour. Heredity 10: 291-299. / pi, 

 5 fig. Oct., 1919. — The author states the extent of meadow culture in Sweden and gives a brief 

 description of his theory and methods of breeding timothy. There follows a brief discussion 

 of the variation and heredity of certain characters as: length of stem, number and length of 

 internodes, thickness of stem, direction of stem, size and color of leaves, form and size of 

 head, variations of flower parts, physiological characters, aftergrowth and disease resistance. 

 There is evidence that these characters are heritable but pure-line selection or breeding is 

 not attempted due to the fact that timothy is open-pollinated. Clonal propagation, individual 

 and mass selections are practised. Practical results show 12 and 20 per cent increase in yield, 

 respectively, of Primus and Gloria timothy in comparative tests with ordinary Swedish tim- 

 othy. Above varieties are resistant to rust and are high yielders of seed. — Maxwell J. Dorsey. 



824. Woods, P. A. Racial origins and honors of war. Jour. Heredity 10: 332. 1919. — 



An analysis of the relation between line of descent and valor in war as indicated by the names 

 of those soldiers who won distinguished service medals in the 26th Division. — Maxwell J. 

 Dorsey. 



825. Woodworth, C. M. The application of the principles of breeding to drug plants, 

 particularly Datura. Bull. Univ. Wisconsin 1005. 32 p., 15 fig. Nov., 1919. — Bulletin was 

 prepared with the feeling that modern principles of breeding should be more generally applied 

 to drug plants with a view to their improvement. Technique of crossing is described and a 

 scheme for improvement in alkaloid content suggested. — A. F. Blakeslee. 



826. Wriedt, Chr. Uber die Vererbung von Ohrenlange beim Schafe. [On the inheri- 

 tance of ear length in sheep.] Zeitschr. indukt. Abstamm. Vererb. 20: 262-263. Feb., 1919. — 

 Short-eared forms occur among ancient types in many regions of Norway, but have very nearly 

 disappeared because of the wide use of Cheviot rams. Author crossed short-eared ewe to Ox- 

 ford ram, obtaining a short-eared lamb. Author has additional records on 3 short-eared sheep 

 in a flock of 10, and found long-eared types never gave short-eared. Concluded that short- 

 eared type is a Mendelian dominant. Results agree with those of Rietzman. However, a 

 recent record on an earless type seems to indicate that short-eared are heterozygotes, for 

 short-eared X short-eared gave 1 long-eared + 5 short-eared -f- 1 earless. — /. A. Detlefsen. 



827. Yampolsky, Cecil. Inheritance of sex in Mercurialis annua. Amer. Jour. Botany 

 6: 410-442. PI. 37-40, fig. 1. 1919. — Author secured both female and male plants of Mercuri- 

 alis annua. The female plants bore a few male flowers the pollen of which was used to ferti- 

 lize the female flowers and thus procure seeds from the female plant. Some of the male plants 

 produced a few female flowers which were pollinated with pollen from the male plant and a 

 few seeds thus obtained from the male plants. All seedlings from female plants were prevail- 

 ingly females; these in turn produced female plants in the next generation when pollinated 

 from the few male flowers which developed upon the plant; similar results were obtained in 



