Aug. 15, 1919 Effect of Removing Pulp from Camphor Seed 



233 



when the seed is pulped and when it is not. The variation in germina- 

 tion of 10 individual lots of seeds from as many parent trees is shown 

 graphically in figure 5. The upper line in each case indicates the germina- 

 tion of pulped seed, the lower line the germination of unpulped seed. 

 Under period of growth, a indicates the date of planting, November 28, 

 1 91 7. The percentage of seeds germinating was determined by counting 

 the number of seedlings in the beds at stated times, indicated in the 

 figure as follows: 6 = February 11, 191 8; (- = February 23, 191 8; d = 



£0 



/o 



Fig. . 



r/?£€ NUMBER 



-Diagram showing percentage of total germination of pulped and unpulped camphor seed from 

 10 parent trees. Black bars represent pulped seed; white bars, unpulped seed. 



March 18, 1918; e = April 27, 1918; / = July 6, 1918; ^ = December i, 

 1918, on which date the seedlings were transplanted. It will be noted 

 that the pulped seed germinated in much shorter time than the un- 

 pulped seed and that after the appearance of the first seedlings the 

 major portion of the gennination took place in a relatively short time. 

 The apparent falling off in the germination of the pulped seed, as indi- 

 cated in the graphs (fig. 5), is due to the effect of the hot sun on the 

 tender seedlings. A large number of the seedlings were burned off at 

 the ground level soon after they pushed up through the hot sand, and 



