. The development of single-germ beet seed. ngle-germ careful examination of this seedwas made and the different sizes wereseparated hj means of sieves having6, 8,10,12, and 14 meshes per inch,are tabulated for convenience to show the percentage of singles thatwere caught in each sieve, while in Plate IV the percentage of single-germ seed is roughly indicated by the number of singles at the end ofthe second row in each set. (See Table I, p. 12.) A study of this tableshows how erroneous is the common impression with reference to thenumber of single-germ seeds that are present in commerc
. The development of single-germ beet seed. ngle-germ careful examination of this seedwas made and the different sizes wereseparated hj means of sieves having6, 8,10,12, and 14 meshes per inch,are tabulated for convenience to show the percentage of singles thatwere caught in each sieve, while in Plate IV the percentage of single-germ seed is roughly indicated by the number of singles at the end ofthe second row in each set. (See Table I, p. 12.) A study of this tableshows how erroneous is the common impression with reference to thenumber of single-germ seeds that are present in commercial of the single-germ seeds are larger than many of the multiple-germ seeds, as shown bj Plate IV, D, compared with singles shown ingroups A, B, and C. In practically all commercial seeds there area few single-germ seeds, but an examination of a large quantity ofcommercial seed and a study of many seed beets in the field show thatthe number of singles produced by the ordinary beet-seed plant is verysmall. (See Table III, p. 22.). Fig. 2 —A single beet flower bud. (See PL IV, B to G.) The results 12 DEVELOPMENT OF SINGLE-GERM BEET SEED, Table I.—Percentage of single-germ seeds from sifting*. Number of meshes per inch. 1( 14 Percentage of single germs. 3 8. - v- The singles that remained in sieves of 6 and 8 meshes to the inchwere of normal size and well tilled: those that remained in the sieve of10 meshes were small but well rilled: those left in the 12 and 11 meshsieves were to a great extent not filled at all. while others were simply immature flowers, all together, theyconstituted bat thesmall percentage —considerably lessthan 8 per cent. Whilewe have no way ofdetermining what bulkof the cleaned seedthese sittings repre-sent, study of seedsobtained from ordi-nary beet plants leadsto the conclusion thatthey do not representmore than one twenty-fifth, or 1 per cent, of single beet flower. A. sepal; B. anther: C. pistil. the original
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