PAPERS ON BIOLOGY AND AGRICULTURE 131 



(3) The greatest fresh weight is, in general, found in 

 seedlings grown from seeds of 1.32, 1.27 and 1.22 specific 

 gravity. 



(4) The lower and specific gravity of the seed, the 

 shorter the second and third intemodes of the seedlings 

 from seeds of equal size. 



(5) The greatest rate of growth, for seedlings from 

 seeds of uniform size, is usually found in seedlings from 

 seeds of 1.32, 1.27 or 1.22 specific gravity. 



(6) From the total dry weight it may be inferred that 

 at 25 -C the seedlings from seeds of Density 6 use their re- 

 served material to the best advantage. 



(7) Seedlings grown from small, medium and large 

 seeds differ in amount and rate of growth. 



(8) The total amount of growth varies directly with 

 the length of the seed. 



(9) Size and weight of seedlings from seeds of uni- 

 form specific gravity show a wider variation (more espec- 

 ially at 25 C) between those from small and medium seeds 

 than between the ones from medium and large. 



(10) Seedlings from seeds of medium length show a 

 greater growth rate than seedlings from either small or 

 large seeds of equal specific gravity. 



(11) From the total dry weight it may be infeiTed that, 

 except at 20 -C, seedlings from the large and medium seeds 

 use their reserve material to better advantage than those 

 from small seeds. 



(12) Seedlings grown in water contain a smaller per 

 cent of water than those from seeds of the same specific 

 gravity and size grown in soil. They are also less brittle. 



(13) The root system of seedlings grown in soil is 

 larger than that of seedlings grown in water. 



(14) The gro\\i:h equation of Blackman does not apply 

 to seedlings grown in the dark. 



(15) A difference in level in the insertion of the coty- 

 ledons on the axis is not correlated with the fresh and dry 

 weights of either root, shoot or plant. 



