154 GENETICS [Bot. Absts., Vol. VI, 



Macrobrachycephalic form is dominant, dolichocephalic the recessive; dolichocephalic how- 

 ever is dominant, while microbrachycephalic would be recessive. Perhaps this dominance 

 is correlated with sex; dolichocephalic form may be dominant in men, brachy cephalic in 

 women. Besides this sons seem to have a tendency to exhibit the headform of their fathers, 

 daughters those of their mothers. — M. J. Sirks. 



1078. Fruwirth, C. Die gegenwartige Organisation der Pflanzenziichtung in Deutsch- 

 land und in Osterreich-Ungarn. [The present organization of plant breeding in Germany and 

 Austria-Hungary.] Nachr. Deutsch. Landw. Ges. Osterr 1919: 35-39. 1919. — After discuss- 

 ing actual conditions author presents view that creation of original stock of seed, following 

 breeding, ought not to be work of small farms nor of associations of such. Advantages of 

 author's methods are pointed out. [From anonymous review in Zeitschr. Pflanzenzucht. 7: 

 118. Dec, 1919.]— J. P. Kelly. 



1079. Fruwirth, C. Allgemeine Ziichtungslehre der landwirtschaftlichen Kulturpflan- 

 zen. (Handbuch der landwirtschaftlichen Pflanzenziichtung Bd. I. Fiinfte ganzlich neube- 

 arbeitete Auflage. [General genetics of agricultural plants. (Handbook of agricultural plant- 

 breeding. Vol.1.) 5th ed., entirely revised.] 8vo, xviii -f- 44® p., 8 pi., 89 fig. Paul Parey: 

 Berlin, 1920. 



1080. Fruwirth, C. Handbuch der landwirtschaftlichen Pflanzenziichtung. II. Die 

 Ziichtung von Mais, Futterriiben und anderen Ruben, Oelpflanzen und Grasern. [Handbook 

 of agricultural plant-breeding. II. The breeding of maize, fodder beets and other roots, oil 

 plants and grasses.] 3rd. ed., 262 p., 50 fig. Paul Parey: Berlin, 1918. — In third edition, lar- 

 ger than second by 60 pages, the sections on fodder beet, maize and other grasses especially 

 have been rewritten to take account of recent work. Thorough handling of literature is 

 emphasized. [From author's statement in Zeitschr. Pflanzenzucht. 7: 144-145. Dec, 1919.] 

 —J. P. Kelly. 



1081. Fruwirth, C, Th. Roemer, E. von Tschermak. Handbuch der landwirtschaft- 

 lichen Pflanzenziichtung. 4. Die Ziichtung der vier Hauptgetreidearten und der Zuckerrube. 

 [Handbook of agricultural plant breeding. Vol. 4. Breeding of the four chief cereals and the 

 sugar beet.] 3rd ed., 8vo, xv + 504 P-, 4^ fig- Paul Parey: Berlin, 1918. — Most parts of this 

 new edition of volume 4 are remodelled, especially the hybridization sections, made neces- 

 sary by the large amount of research of recent years. Recasting of one part has been due also 

 to there being a new co-author, RoE\fER, who has written section on beets. Enlargement of 

 present volume is kept within 40 pages by limiting general discussion and making reference 

 to earlier edition for certain less frequently used portions. [From anonymous statement in 

 Zeitschr. Pflanzenzucht. 7: 145. Dec, 1919.]— J. P. Kelly. 



1082. Gassner, S. Beitrage zur physiologischen Characteristik sommer- und winteranu- 

 eller Gewachse, inbesondere der Getreidepflanzen. [Contributions on the physiological char- 

 acteristics of summer and winter annuals with special reference to the cereals.] Zeitschr. Bot. 

 10: 417-480. 7 fig., 2 pi. 1918. — Author recalls his earlier experiments showing that with 

 obligate winter-annual cereals shooting-up in spring requires a cold period during or subse- 

 quent to germination. In present paper he presents further experimental details. With 

 Petkus summer-rye there was no after-influence of various temperatures during germination. 

 Petkus winter-rye, bred from same original population as Petkus summer-rye, showed marked 

 effects of temperature. The cold requirements of Svalof Extra Squarehead were as great as 

 in Petkus winter-rye but were less pronounced for Friedrichswerther winter-rye. Cold 

 requirements of other varieties are also given. As distinguishing winter and summer cereals 

 author emphasizes cold requirements of former and sensitivity to frost of latter and not 

 relative length of life of the two kinds. These characteristics should be kept in mind in 

 genetical work on summer and winter cereals. The need for low temperature and resistance 

 to frost are positively correlated. [From anonymous review in Zeitschr. Pflanzenzucht. 7: 

 118-120. Dec. 1919.]—/. P. Kelly. 



