No. 1, August, 1920] GENETICS 1 1 



318. AitTHUR, J. M. [Rev. of: FoLSOM, Donald. The influence of certain environmental 

 conditions, especially water supply, upon form and structure in Ranunculus. Physiol. Res. 2: 

 209-276. 24 fig. Dec. 1918. (See Hot, Absts. 1, Entry lis*,; ■_>, Entry307.)] Bot.Gaz.69: 

 271. Mar., 1920. 



■319. Bach, Siegfried. Noch ein Bastardierungsversuch Pisum X Faba. [Another hy- 

 bridization experiment, Pisum X Faba.) Zeitschr. Pflanzenziicht. 7: 73-74. June 1019. — 

 Of ten emasculated flowers of Victoria peas, seven were pollinated with Vicia faba pollen, 

 while three were left unpollinated. All ten were bagged. After 48 hours, 3 of the pollinated 

 flowers were fixed in Flemming's solution and imbedded in paraffin. Later sections stained 

 with Heidenhain's haematoxylin showed only a few very short pollen-tubes and these in no 

 case were observed penetrating the stigmatic surface. After 8 days, the remaining seven 

 bagged flowers, both pollinated and unpollinated, were found to have developed to the same 

 degree, small pods 1-2 cm. long 0.4 to 0.6 cm. wide with shriveled seed-"anlagen," and within 

 another 10 days, these dried up and fell off. Results confirm Gartner and von Tschermak. 

 Seedless pods are parthenocarpic and formed without pollination. Inability of Vicia faba and 

 Pisum to hybridize lies in lack of chemical stimuli to promote pollen-tube growth. — Orland 

 E. White. 



320. Bach, Siegfried. Zur naheren Kenntnis der Faktoren der Anthozyanbildung bei 

 Pisum. (To a more exact knowledge of the factors for the formation of anthocyan in Pisum.) 

 Zeitschr. Pflanzenziicht. 7: 64-65. June 1919. — Red Fi heterozygote Pisum flowers from red- 

 flowered X white-flowered (ABaB) and pink-flowered X white-flowered (AbaB) crosses are 

 indistinguishable to the eye from those of the red-flowered homozygote (ABAB). Investi- 

 gations of the concentration and other characteristics of anthocyan, demonstrated that an- 

 thocyan development, both qualitatively and quantitatively, is the same in all these genetic 

 types. Comparisons of pink-flowered homozygous types (AbAb) with the above red-flowered 

 types shows an anthocyan concentration difference of 2:1 in favor of the latter. Milton Brad- 

 ley color scale showed color extracts from red-flowered types to be similar to "Violet red," 

 and pink-flowered extracts to be "Violet red tint no. 1." Concludes that red-flower coloring 

 matter differs from that of pink in having greater anthocyan concentration and in being a 

 distinct kind of anthocyan. Factor A is more important in furnishing a basis for anthocyan 

 formation than factor B, the latter acting as a modifying agent which changes the anthocyan 

 of pink-flowers to that of a new type (red) with more violet in it. Names of pea varieties 

 used are cited and methods of procedure are given in detail. — Orland E. White. 



321. Batkson, W. Dr. Kammerer's testimony to the inheritance of acquired characters. 

 Nature 103 : 344-345. July 3, 1919.— Reply to Prof. MacBride (Nature, May 22), describing 

 personal experiences which cast serious doubt upon veracity of Kammerer's claims of inherit- 

 ance of acquired characters in salamanders. — Merle C. Coulter. 



232. Baudouin, M. Decouverte d'un procede sur pour reconnaitre le sexe des axis 

 humains a tout age. [Discovery of a process for the recognition of sex in the human axis at all 

 ages.] Compt. Rend. Acad. Sci. Paris 167: 652-663. 1918. 



323. Baumann, E. Zur Frage der Individual- und der Immunitatszuchtung bei der 

 Kartoffel. [On individual selection and breeding for immunity in potatoes.] Fuhlings Landw. 

 Zeitg. 1918:246. 1918. 



324. Baumann, E. Beitrage zur Kenntnis der Rapspflanze und zur Ziichtung des Rapses. 

 [Contribution to a knowledge of the rape plant, and to the breeding of the rape.] Zeitschr. Pflan- 

 zenziicht. 6: 139. 2 fig. 1918. 



325. Becker, J. Vererbung gewisser Blutenmerkmale bei Papaver Rhoeas. [Inherit- 

 ance of certain floral characters in Papaver Rhoeas.] Zeitschr. Pflanzenziicht. 6: 215-221. 

 S fig. 1918. 



