122 



TIh (rriitriiHi of Liiist'fd in hJiKihiiul 



that, from this point of view, little is gaiued by allowing the seed to 

 ripen before harvesting the crop. In view of its agricultural interest 

 an attempt was made by the present authors to repeat this work. As 

 no mention is made by Ivanoff as to the means adopted to secure seed 

 of uniform ripeness at the dates of gathrring and as difficulty was 



experienced in doing this a diSerent procedure was adopted. Instead 

 of gathering the seed at different dates after flowering, the seed collected 

 at harvest was separated into four groups of increasing degrees of 

 ripeness, viz. : 



A. The seed quite green ; 



B. The seed just beginning to turn brown; 



C. The seed wholly brown, but not loose in capsule ; 



D. The seed fully ripe, i.e. quite loose in capsule. 

 Determinations of the oil content of these various groups gave the 



following results : 



A. 19-86 % ; 



B. 25-30%; 



C. 37-41%; 



D. 40-84%; 



22-23%; 

 29-17%; 

 38-94%; 

 40-93%; 



35-77%; 



mean = 21-045%,; 

 mean = 30-08 % ; 

 mean = 38-03 %, ; 

 mean = 40-88%,. 



Notwithstanding the fact that, in all cases, the analyses were made 

 immediately after gathering the seed, as had been anticipated, it was 



