28 EXPERIMENT STATION RECORD. [VoL 37 



and sexual reproduction are not fundamentally different In respect to the 

 extent and range of variation. 



A bibliography of literature pertaining to the subject is given. 



Mutation in Matthiola annua, a " Mendelizing " species, H. B. Fbost 

 {Amer. Jour. Bot., 3 {1916), No. 7, pp. STiSSS, figs. 5).— The author states that 

 six or seven of the series of types noted previously (E. S. R., 28, p. 439) as 

 having sprung from M. ajinua have reproduced themselves in progeny tests, 

 some through several generations, though only the early (few-noded) type has 

 proved to be evidently homozygous. A brief characterization is given of eight 

 of the mutant types, including all that have proved to be hereditary. 



The mutant individuals are considered to be not extracted pure recessives 

 but heterozygous dominants, and (since thoy have occurred many times in 

 cultures from selfed parents) not due to combination of complementary factors 

 by cross-fertilization. They are considered to be due to definite changes in the 

 germ plasm distinct from the shiftings which result from ordinary Mendelian 

 phenomena. 



Correlations between morpfaological characters and the saccharin content 

 of sugar beets. F. .J. I'kitchard (Amer. Jour. Bot., 3 (1916), No. 7, pp. 56/- 

 £76, figs. 8). — Extensive statistical data obtained from a study of beets are said 

 to show correlation coefficients between root weight and sugar percentage of 

 — 0.253, —0.258, -0.254, -0.257, and -0.499; between weight of root and 

 quantity of sugar, 0.920. Correlation between percentage and quantity of 

 sugar iu roots of 35 gm. range in weight was nearly perfect, being 0.93, 0.96, 

 and 0.99, but no such correlation appeared In roots of miscellaneous sizes. 

 Correlation was slight or absent between other qualities noted. 



Anomalies in Beta vulgaris, O. Munerati and T. V. Zappaboli (Atti R. 

 Accad. Lincei, Rend. CI. Sci. Fis., Mat. e Xat., 5. scr., 25 (1916), I, \o. 12. pp. 

 816-822, figs. 6). — This Is a progress report on the continuation of studies pre- 

 viously noted (E. S. R.. 35, p. 436). Morphological deviations, which have 

 proved to be much more frequent than formerly appeared, are reported on as 

 regards the portions of the plant involved, and certain correlations have been 

 observed. 



Green manures and manuring in the Tropics, including an account of the 

 economic value of Leguminosse as sources of foodstuffs, vegetable oils, etc., 

 P. DE SoRNAY, trans, by F. W. Flattely (London: John Bale, Sons d Danielsson, 

 Ltd., 1916, pp. XVI +466. figs. TJf). — In this translation from I^s IMantes Tropi- 

 cales Allmentalres et Industrlelles de la Famllle des LCgumlneuses, the author, 

 after suhamarizing Investigations and theories regarding the fixation of free 

 atmospheric nitrogen by leguminous plant*;, describes about 40 species that are 

 more or less extensively grown In the Tropics as green manure crops, as well as 

 for forage and other purposes. Comparisons are drawn between several com- 

 mon species as to their relative values In rotation experiments. Chapters are 

 devoted to the presence of manganese and prussic acid In leguminous plants, a 

 description of the principal starches they contain, their uses In agriculture and 

 various arts, insect and fungus pests, etc. Much of the Information Is derived 

 from reports of experiments conducted In various countries, but the author 

 adds nuich original matter from his own Investigations at the agricultural 

 station of the island of Mauritius. 



FIELD CROPS. 



[Report of field crop work at the Georgia Experiment Station], 0. K Mc- 

 Clelland (Georgia Sta. Rpt. 1916, pp. 7-9, 28-5i).— Fertilizer tests with corn 

 showed an Increase of 13.4 per cent when fertilizer was applied around the corn 



