PAPERS ON BIOLOGY AND AGRICULTURE H7 



from seeds of the higher and lower densities. While in 

 average values, the diameter of the shoot varied with the 

 density, this does not hold true for the maximum values. 



With but few exceptions the minimum values for shoot 

 height and diameter are found in seedlings from seeds of 

 Density 5 or 6, usually the latter. 



From these comparisons we may conclude that, for seed- 

 lings grown in water at a temperature of 25 'C. 



(1) The greatest height and diameter of shoot are 

 found in seedlings from seeds of Densities 1, 2 and 3; in 

 Density 2 or 3 more often than in 1; 



(2) The lower the density, the shorter the second and 

 third intemodes. 



Weight. — That weight is related to density is clearly 

 seen from a study of the tables. The average weight values 

 are considered in Tables 18 to 20. In the case of the fresh 

 weights of roots, shoots and plants for seedlings from the 

 large and the small seeds, the three greatest average 

 weights for each size group are found in the seedlings of 

 the three highest densities. For the medium seeds, the 

 highest average fresh root weight is in the seedlings from 

 seeds of Density 4, but the second highest is in those of 

 Density 1. The highest average values for fresh shoot 

 and fresh plant weights for the seedlings from these med- 

 ium seeds are in those of the three highest densities as was 

 the case for the seedlings from the small and large seeds. 



The maximum fresh root weight for the small seeds is 

 found in a seedling from a seed of Density 3 ; for the med- 

 ium seeds from a seed of Density 4 ; and for the large seeds, 

 from a seed of Density 2. The maximum fresh shoot weight 

 for the small seeds is that of a seedling from a seed of Den- 

 sity 1 ; for medium seeds, of Density 1 ; for large seeds, of 

 Density 3. The maximum fresh plant weights for seedlings 

 from the small and the medium seeds are for those from 

 seeds of Density 1 ; for the large seeds, for one from a seed 

 of Density 2. The minimum fresh weights are usually the 

 weights for seedlings from seeds of Density 5 or 6. 



A better idea of the actual amount of growth can be ob- 

 tained from the dry weights than from the fresh weights. 



