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



1621. Anonymous. [German rev. of: White, 0. E. Breeding new castor beans. Jour. 

 Heredity 9: 195-200. May- June, 1918. (See Bot. Absts. 1, Entry 249.)] Zeitschr. Pflanzen- 

 ziicht. 7:220. June, 1920. 



1622. Anonymous. [German rev. of: White, Orland E. Inheritance studies in Pisum. 

 III. The inheritance of height in peas. Mem. Torrey Bot. Club. 17: 316-322. June 10, 1918. 

 (See Bot. Absts. 1, Entry 250.)] Zeitschr. Pflanzenziicht. 7: 220. June, 1920. 



1623. Anonymous. [German rev. of: White, O. E. Inheritance studies on castor beans. 

 Brooklyn Bot. Gard. Mem. 1: 513-521. 6 pi. July, 1918. (See Bot. Absts. 1, Entry 952.)] 

 Zeitschr. Pflanzenziicht. 7: 221-222. June. 1920. 



1624. Anonymous. [German rev. of: Wohanka and Company. 28. Jahresbericht der 

 Riibensamenzuchtungen von Wohanka & Comp. (28th annual report of the beet breeding of 

 Wohanka & Co.) 95 p., 5 fig. Wohanka & Co. : Prag, 1918.] Zeitschr. Pflanzenziicht. 6: 196. 

 Dec, 1918. 



1625. Anonymous. [German rev. of: Zade. Die Versuche iiber Klee- und Graser- 

 ziichtungen des landwirtschaftlichen Institutes Jena. (Experiments in clover and grass breed- 

 ing of the Jena Agricultural Institute.) Jahrb. Deutsch. Landwirtsch. Ges. 1918: 139-150. 

 1918.] Zeitschr. Pflanzenziicht. 6: 197. Dec, 1918. 



1626. Anonymous. [German rev. of :Zinn, J., and F. M. Surface. Studies on oat breed- 

 ing. V. The Fi and F 2 generations of a cross between a naked and hulled oat. Jour. Agric. 

 Res. 10: 293-312. 1917.] Zeitschr. Pflanzenziicht. 6: 197. Dec, 1918. 



1627. Aumiot, J. Rajeunissement et perfectionnement de la pomme de terre. [The 

 rejuvenation and improvement of potatoes.] Compt. Rend Acad. Agric France 5 : 905-910. 

 1919. — Several thousand potato seedlings were grown from crosses between cultivated 

 varieties and also hybrids with Solanum commersonii and S. maglia. The plants were 

 vigorous and flowered abundantly. The progenies varied in yield, and a table is appended 

 giving the number and weights of the tubers. The experiments comprised 24 crosses 

 between ten cultivated varieties and a hybrid between S. maglia X S. tuberosum var. 

 Enowflack. The vigor and productivity were infinitely superior to the open-pollinated 

 parents. The form and color of the skin and flesh were modified also. Many crosses with 

 "Bolivienne lObis" were free from rot and were resistant to Phytophtora infestans. The cross 

 between S. maglia and S. tuberosum var. Enowflack was intermediate between the parents 

 though tending to resemble more closely S. tuberosum. — A mutation from S. maglia to S. 

 tuberosum is recorded. This mutant resembled the common cultivated potato in the charac- 

 ters of both plant and tubers. Three mutants were found in S. commersonii which resembled 

 each other in tuber characteristics. It is stated that many mutants are suitable for culti- 

 vation, but one found in S. maglia has proved to be very susceptible to Phytophtora infestans. 

 He concludes that although the uncultivated species of potatoes apparently are unpromising 

 from the standpoint of obtaining varieties suitable for commercial cultivation, nevertheless 

 entirely satisfactory mutants are found, and he believes that the potato can be improved 

 rapidly through crossing. — /. H. Kempton. 



1628. Bach, Siegfried. Zweierlei Weisslinge bei Mais. [Two kinds of albinos in maize.] 

 Zeitschr. Pflanzenziicht. 7:238-241. June, 1920. 



1629. Baudouin, M. Decouverte d'un procede sur pour reconnaitre le sexe des axis hu- 

 mains a tout age. [Discovery of a process for the certain recognition of sex in the human axis 

 at all ages.] Compt. Rend. Acad. Sci. Paris 167: 652-653. 1918.— The diameters of the fora- 

 men of the vertebral human axis from both sexes of various ages were measured. It was found 

 that the difference between the anterior-posterior diameters and the transverse diameters 

 of the foramina was very marked in the males while in the females it was always very slight. — 

 D. D. Whitney. 



