^5 



state of health — can be reckoned to pure seed, are considered as such. Thereupon, 

 again 100 specimens are carefully told off and examined mycologically after germinating; > 

 In the report it is stated that the purity is x % and that of 100 seeds considered as 

 pure, y% are infected with Pusariiim, or another disease as the case may be. 

 6. Partial germing of seeds. Seeds showing already an initial germination. 

 Shooting of cereals and other seeds will bring about many difficulties in the' 

 examination. If you investigate the effect of shooting upon germinating power (and 

 we did so in a great number of cases) you will often be surprised at the slight damage 

 caused. Consequently, the assertion that all shot seeds has to be reckoned to the 

 impurity is untenable. There is no room here for a description of the .several methods 

 for surmounting the difficulties mentioned. Only the observation of a great many' cases 

 and much experience scrupulously verified, can show the right way here. The said 

 experience, however, is often found wanting; depending upon it would lead us to a 

 slippery road; learned speculations aire of no practical use, but the thing that matters 

 is a figure obtained by methods that can be easily put in practice by every one, so 

 that errors in analyses and divergent results are out of the question. In this way 

 only can unification be effectuated. That is why I came to consider shot corn as 

 purity, except in extreme cases. Whether the seed that contains much shot is reaUj' 

 of inferior quality, yes or no, will yet become evident at the determination of the 

 germinating' power. Consequently it cannot be right to state only the purity, or only 

 the germinating power, when determining the quality of com. 



Gentlemen, we now are approaching a limit which I must not cross. I did not 

 purpose to write a book on determining the purity of seeds, or on the methods adopted 

 at Wageningen. I only intended to illustrate the latter with some examples. It was an 

 other desire that made me travel all the way to fair Copenhagen. I wanted to witness 

 a cordial hand-shake between the many who have to till the same field; I wanted to find 

 mutual fresh co-operation. May this congress be a mean for leading to international 

 collaboration, for opening very widely the international doors- 



APPENDIX C. 



Form foi' Certificate for International grading of Seeds. 

 f.L 



Seed Testing Station for 



(Government Station for International grading of Seeds — 



Internationale SamenkontroUstation fur die Gradbestimmung von ^ Samereien — 



Station Internationale pour la graduation des semences). 



Sample: Marked: ^Sealed: . . 



Muster: Gemarht: Gesiegelt: 



EcJianUllon: Marque: Cachete: . 



Registernumber : Received: . . . 



Buchnwnmer : Empfangen,: 



Numero du registre: ReQu: 



Fee: Grade: 



Gebiihr: Grad: . 



Frais: Grade: 



Direotor. 

 Direktoy. 

 Directeur. 



