28 



werden, wozu aber nOtigenfalls die 

 betreffenden Regierungen ihre Zu- 

 stimmung sicher niclit versagen 

 werden". 

 Mr. George H. Clark, Seed Commissioner, Ottawa, Canada, expressed 

 his pleasure in Mr. Bruijning's paper. As president of the Association of 

 Official Seed Analysts of North America he represented both the United 

 States of America and Canada. This association holds annual meetings. The 

 general policy is to test grass seeds according to the Continental method. 

 The seed-merchants of North America favor this. However it is believed 

 by many in the United States and Canada who sow by machine (bulk) 

 that it is better to use the Irish method. Percentage of germinable seeds 

 is to include all in the bulk. All staple commodities, such as cereal grains, 

 dairy products, meat &c., are sold on basis of grade according to a fixed 

 standard of quality. This does away with many difficulties. The Canadian 

 Seed Control Act which has been in force for 10 years is very satisfactory. 

 6^rade is fixed as Extra No. 1, No. 1, No. 2, No. 3 and "rejected". This includes 

 the general quality of the seed. When a selection of special seed is 

 required this name is added to the grade, for inst. Irish No. 1 Red clover. 

 Hoped that Europe will adopt "grade" as basis for quality as it is better 

 than "germinating power". 



Dr. Y. Buchholz, Directeur chef de la station d'essais de semences 

 de I'etat, Christiania, 



did not wish to oppose the term 

 "grade", but the word suggested a 

 mathematical formula. According to 

 the ;gure seed it is still easy, but 

 when also the weed is to be taken 

 into consideration it is more difficult, 

 because the weed not only is 

 different injurious for the different 

 species', , but also at the different 

 times. It seems gratuitous to sub- 

 tract the figure 3 times the weed 

 seed. The question is difficult, unless 



Germinating powerX. Purity 

 grade = ^ . 



A more definite formula is difficult 

 to fix. 



„Ich will nicht Stellung gegen 

 das Wort „Grad" nehmen. Man denkt 

 jedoch bei „Grad" an einen be- 

 stimmten Teil eines MaBes. Einen 

 passenden Ausdruck zu finden wird 

 schwierig sein. Mit den reinen 

 Samen ist es noch einf ach ; wenn aber 

 das Unkraut mitberiicksichtigt werden 

 soU, wirdesschwieriger. Das Unkraut 

 ist nicht allein verschieden schadlich 

 nach den verschiedenen Arten, sondern 

 auch zu verschiedenen Zeiten. Die 

 Zahl 3 (Oder irgendeine andere Zahl) 

 mal Prozente Unkraut in Abzug zu 

 bringen, scheint deshalb ganz will- 

 kiirlich, und ich halte prinzipiell auf 

 die einf ache Formel: 



Beinheit X Keimfdhigk eii 

 100 ~~ . 



auch fiir den Fall, dafi der Ausdruck 

 „Grad" eingefuhrt wird". 



