48 GENETICS [Bot. Absts., Vol. V. 



and black and tans appears due to genetic causes transferable to non-yellow varieties. Cross- 

 between agouti (light) and black and tan (dark) gives' Fi sables and agoutis both intermediate. 

 Further hybrid generations showed many light segregates both yellow and non-yellow, and 

 fewer dark segregates. No extreme dark segregates found in yellow (black and tan) types, 

 and few extreme dark non-yellow segregates. These latter proved not homozygous for dark- 

 ening factors. Results indicate presence of genetic factors similar to those producing dif- 

 ferences in size of rabbits. This similarity indicates unsuitableness of material for production 

 of clear and analyzable results, rather than insoluble nature of problem. Correct interpreta- 

 tion of such differences must await combination of optimum of material and method. — C. C. 

 Little. 



358. Eaton, S. V. [Rev. of: Dorsey, M. J. Relation of weather to fruitfulness in the 

 plum. Jour. Agric. Res. 17: 103-126. PI. 13-15, 1 jig. June 16, 1919. (See Bot. Absts. 3, 

 Entry 1478.)] Bot. Gaz. 69: 269. Mar., 1920. 



359. Ebstein, A. Zur Frage des Vorkommens von Kretinen und Albinos in Lehrbach im 

 Karz. [On the occurrence of cretins and albinoes in Lehrbach in the Harz.] Die Naturwissen- 

 schaften 6: 561-565. 1918. 



360. Eisenberg, P. Untersuchungen iiber die Variabilitat der Bakterien. VII. Uber 

 die Variabilitat des Schleimbildungsvermogens und der Gramfestigkeit. [Investigations on 

 the variability of bacteria. VII. On the variability of the slime-building capacity and in Gram- 

 reaction.] Centralbl. Bakt. Parasitenk. 82: 401. 1918. 



361. Everitt, P. F. Quadrature coefficients for Sheppard's formula (c). Biom. Vol. 1: 

 p. 276. Biometrika 12: 283. Nov., 1919. — This table gives constants necessary for rapid cal- 

 culation of the area of a curve, from equally spaced ordinates. — John W. Gowen. 



362. Findlay, Wm. M. The size of seed. North Scotland Coll. Agric. Bull. 23. IS p. 

 1919.— See Bot. Absts. 3, Entry 1361. 



363. Fischer, E. Die Beziehungen zwischen Sexualitat und Reproduktion im Pfianzen- 

 reich. [Relation between sexuality and reproduction in the vegetable kingdom.] Mitteil 

 Naturf. Ges. Bern. 1918: 1-4. 1918. 



364. Fries, Rob. E. Strodda iakttagelser over Bergianska Tradgardens gymnospei-mer. 

 [Miscellaneous observations on gymnosperms in the Bergian garden.] Acta Horti Bergiani 

 [Stockholm] 6: 1-19. 1 pi., 1 fig. 19 — . — The original specimen of Larix americana Michx. f. 

 glauca Beissn. is characterized by chlorocarpy. Color of needles is certainly in large part 

 blue-green (glauca). Shoots with typical light-green color are to be seen here and there, 

 however, which is also shown in a colored plate. The cause of this fact, suggesting chimera- 

 phenomena, is not as yet explained. Of Picea Engelmannii (Parr) Engelm., author describes 

 a virgala and a prostrala form, both belonging to the glauca type. Teratological formations 

 in the strobiles of Larix decidua are described. — Report is given on the winter-resistance of 

 different kinds of needle-trees. Different observations concerning the process of flowering 

 are given and discussed. Pinus cembra, Picea nigra and Abies arizonica seem during the in- 

 dividual life to have a 9 stage preceding the androgynous stage. In Pinus ponder osa var. 

 scopuloi'um, Picea omorica and Abies concolor, on the contrary, a o" stage seems to precede the 

 stage with both sexes. — K. V. Ossian Dahlgren. 



365. Fritsch, K. Floristische Notizen. Uber Rumex Heimerlii Beck uud einige andere 

 angebliche Tripelbastarde aus der Gattung Rumex. [Floristic notes on Rumex Heimerlii Beck 

 and several other supposed triple hybrids in the genus Rumex.] Osterr. Bot. Zeitg. 67: 249-252. 

 1918. 



