75 



54. 1910. Qvam, O. 



Technische Vorschriften fiir die Prufung von Saatgufc, 18 Dez., 

 1909. Landw. Vers. St., S. 383. 



65. 1922. Dorph-Petersen, K. 



Die danische Staatssamenkontrolle. Kopenhagen. 



56. 1912. Heinrich, M. 



Eiaige Erfahrungen bei Keimpriifungen im Jahre 1910-1911. 

 Landw. Vers. St., End. 78, S. 165. 



57. 1913. Honcamp. 



Besprechungen der Technischen Vorschriften fvir Samenpriifungen. 

 Landw. Vers. St., Bnd. S. 159. 



68. M. T. Munn. 1924. 



Rules for seed-testing. Circular 73 of the New York State Agri- 

 cultural Experiment Station, Geneva. N. 4, p. 9. 



Dr. von Degen expressed the view that Dr. Franck's methods 

 would not be suitable for grains grown in countries where the 

 climatic conditions were different from those obtaining in HoUand. 

 In Hungary, for instance, fully matured seeds were obtained 

 because of the dry weather experienced during the period of 

 ripening. The method of alternating temperatures was, however, 

 necessary in the case of Beta seeds obtained from Germany. 



Professor Bussard pointed out that humidity was a factor to be 

 borne in mind in the case of seeds from northern countries. Tests 

 of grain from these countries which had a low germinating power 

 gave excellent results when the seed had been dried. 



Mr. Anderson was of the opinion that the term " after-ripened " 

 (or " incomplete maturation ") did not adequately cover the 

 condition, as it appeared to be a characteristic of certain varieties 

 of seeds that they did not germinate well under artificial condi- 

 tions. At his Station (Edinburgh) they had adopted, chiefly for 

 commercial reasons, the practice of " shelling " those seeds in oat 

 samples which did not germinate weU in a sterile raedium (sand). 

 This practice generally induced rapid germination and gave a result 

 more in accordance with that obtained when a natural medium 

 (soU) was utilised as a seed bed. He congratulated Dr. Franck on 

 his excellent paper, both as regards material and the manner in 

 which it was presented. The information contained in the paper 

 would be of great assistance to those who had a considerable 

 number of cereals to germinate and who experienced difficidty iti 

 obtaining good results. 



Mr. Clark also expressed appreciation of the excellence of the 

 paper which entered into some of the most difficult problems 

 experienced in Canada. They had frequently to deal with grain 

 which had " frosted " before it matured, and had found it useful 

 under certain conditions to dry the seed under glass exposed to the 

 sun for as long as 10 days. 



