1920] 



SHULL— SEEDS 



38i 



and only for that portion of the curves which precedes the rise 



in rate. 



Difficulties were encountered in choosing an empirical formula 

 for the split pea data, owing partly no doubt to the fact that no 

 duplicate tests were run, and the only set of data showed rather 

 large irregularities at the beginning of the absorption. Curves 

 closely approximating the data beyond 5 minutes ran below the 

 point of origin. The one minute value ran quite too high in the 

 20 and 35 C. data, and somewhat too low in the 5 C. series. In 

 any case the constant c in the formula was so small that it was 

 thought best, after considering all possibilities, to run the com- 



TABLE XIV 



Algebraic curve for absorption data; Small Scotch Yellow split pea 



Time 

 (min- 

 utes) 



5° 





20 



35° 



Low 



i-77 j 



Computed 



High 



Low 



Computed 



High 



Low 



Computed 



High 



I... 



1. 81 



7-25 



11.88 

 I530 







3-75 

 13.27 



20.21 

 2493 



538 



A..1Q 



5 77 





7.26 

 1558 



13.26 

 19.98 



16.34 



l6.4I 1 

 26.47 



3373 



39-43 



10.,. . 



11.50 



26.54 





2509 



33-65 



20 , 





41.54 







22. l6 

 26.64 



22.48 



33 69 



3384 













Break up 





48 , 









40.30 

 Break up 



43 01 







60... . 



29.82 



29.97 

 32.62 



Break up 















36.37 























| 







puted curves through the point of origin, and omit that cons tar 

 altogether. The generalized formula then takes the form y = a log 



(6x+i). 



formulae 



C. curves for the 



Small Scot 

 as follows : 



are 



5°C.:y = 30.i3 log ro (o. 148.*+ 1) 

 20 C.:y = 34.58 log I0 (0.284^+1) 

 35°C.:y=6o.9o log I0 (0.172^+1) 





Using these empirical formulae, we have secured a -fair agreement 

 between calculated and observed intake, not so close as in the 

 case of Xanthium, but much closer than is frequently obtained 



