No. 2, September, 1920] GENETICS 191 



cephalit-x scmdtiius and throe species of Minna, showed no Lntergradation of the secondary sex 

 characters. In other species, however, as Simocephalus vetulus, sex-intergrades appeared very 

 infrequently and in Daphnia longispina they were not very unusual. Frequently, in Simo- 

 cephalus vetulus, there were many male intergrades produced with the female intergrades, 

 but in Daphnia longispina, the intergrades were nearly all females. Sex intergrades appeared 

 in certain cultures of Simocephalus Vi tulus in t he 131st generation, in 1915, and have cord inued 

 to appear throughout the 57 subsequent generations in the following three years. The females 

 that showed only slightly developed intergrading sex characters reproduced with normal 

 vigor but those with fully developed male characters were sterile. — D. D. Whitney. 



1453. Barnils, Perk. Les elements hereditaires dans le langage. [The hereditary ele- 

 ments in language.] Compt. Rend. Soc. Biol. 82: 828-829. 1919. 



1454. Bartlett, J. T. A plant-breeder's opportunity. Sci. Amer. 121: 372. 1919. — 

 Desirable varieties of fresh vegetables and fruits are already available, but breeder now has 

 notable opportunity in developing varieties adapted to such by-product industries as canning 

 and evaporating. Special demands made, such as low water content, strawberries which 

 husk easily, etc. Emphasizes that canners and evaporators use first-quality produce, not 

 produce unsuitable for shipment in fresh condition. — Merle C. Coulter. 



1455. Batjin, P. Sur la dimegalie des spermies dans certaines doubles spermatogenese. 

 Sa signification. [On dimegaly of sperms in certain cases of double spermatogenesis. Its sig- 

 nificance.] Compt. Rend. Soc. Biol. [Paris] 83: 432^134. Mar., 1920. 



1456. Baumann, E. Zur Frage der Individual- und der Immunitatszuchtung bei der Kar- 

 tofiel. [On the question of individual selection in potatoes and the breeding for immunity.] 

 Fuhlings landwirtsch. Zeitg. 67: 246-253. 1918. — Author points out the necessity of studying 

 commercial potato varieties by means of clones. Data based on a number of individual 

 selections vegetatively propagated from two varieties are presented. High yields are asso- 

 ciated with an increase in number of tubers but a decrease in size. The percentage of starch 

 in the tubers is lower in high yielders although the absolute amount of starch is greater. — 

 Data on the influence of various leaf diseases in reducing yield is discussed. Author believes 

 that the chief causes of "running out" in potatoes are leaf diseases. — R. J. Garber. 



1457. Bishop, O. F., J. Grantham, and M. J. Knapp. Probable error in field experiments 

 with Hevea. Agric. Bull. Federated Malay States 6: 596. 1918. 



14.58. Blaringhem, L. Polymorphisme et fecondite du Lin d'Autriche. [Polymorphism 

 and fecundity in Austrian flax.] Compt. Rend. Soc. Biol. [Paris] 82: 756-758. 1919. 



1459. Blaringhem, L. Vigueur vegetative compensatrice de la sterilite, chez les hybrides 

 d'especes de Digitales (D. purpurea et D. lutea). [Vegetative vigor compensating for the ster- 

 ility in a species hybrid of Digitalis (D. purpurea and D. lutea).] Compt. Rend. Acad. Sci. 

 [Paris] 169: 481-483. 1919.— Reciprocal crosses of Digitalis purpurea, L., and D. lutea, L., 

 give sterile progeny which surpass both parental species as follows: 



purpurea hybrid lutea 



Height 50-150 cm. 150-185 40-80 



Dry weight 150 g. 200-275 50 



Duration of life biennial many years triennial 



First generation plants are very uniform. Reciprocal crosses do not differ in vegetative fea- 

 tures but flowers differ in size, shape and color. — D. F. Jones. 



1460. Bliss, A. J. Hybridizing bearded Iris. Gard. Chron. 67: 225. May 8, 1920.— 

 Attempts to coordinate the results obtained by Bliss and by Sturtevant as to genetic compo- 

 sition of certain plicalas, basing an explanation on the results of Bateson and Punnett's 

 experiment with Emily Henderson sweet pea, [See also Bot. Absts. 5, Entries 331, 1669.] — 

 ./. Marion Shull. 



