I9I9] 



ROSE— AFTER-RIPENING AND GERMINATION 



299 



N/iooo, N/2000; for mercuric chloride N/400, N/iooo, N/2000, 

 N/4000, N/io,ooo; and for potassium iodide N/20, N/ioo, N/500, 

 N/iooo, N/2000. Three sets of cultures were set up in duplicate. 



TABLE XI 

 Samhucus seeds in acids, bases, and salts 



Substance 



HCl 



H.SO4 



H.SO4 



NH4OH 



NH4OH 



C6H8O9 



KNO3 



KNOj 



KNO3 



C0NO3 



C0NO3 



NH4NO3 



NH4NO3 



NaNOj 



NaNOj 



NaNO, 



NaNO, 



Na.S04 



NiSO^ 



NiS04 



NiS04 



(NH4).S04 



ZnS04 



KCL 



LiCl 



NaCl 



NH4CI 



NH4CI _. 



Potassium citrate . 

 Potassium citrate . 



KCIO3 



KI 



KCNS 



K.HPO4 



KaHP04 



Distilled water. . . 

 Distilled water. . . 

 Distilled water . . . 



Normality of 

 solution 



N/5000 



N/2500 



N/ 1 0,000 



N/iooo 



N/5000 



N/400 



N/20 



N/200 



N/iooo 



N/200 



N/iooo 



N/200 



N/iooo 



N/20 



N/200 



N/200 



N/iooo 



N/200 



N/20 



N/200 



N/iooo 



N/200 



N/20 



N/20 



N/iooo 



N/200 



N/20 



N/200 



N/20 



N/iooo 



N/iooo 



N/20 



N/200 



N/20 



N/iooo 



Number of 

 seeds 



65 

 66 



63 

 89 

 96 



lOI 



78 



77 

 86 

 92 



87 

 108 



56 

 96 



83 



72 



65 

 94 

 84 

 86 

 76 



85 

 86 

 80 

 80 

 89 

 97 

 84 

 84 

 95 

 81 

 89 

 90 

 83 

 55 

 70 



85 

 109 



Percentage of 

 germination 



17 

 18 



15 

 23 

 13 

 21 



28 

 13 

 24 



4 

 24 

 14 

 14 

 20 



'Z3> 



25 



9 



10 



10 



7 



15 



5 



41 



o 



o 



I 



2 



13 

 o 



7 



9 



10 



9 



I 



o 

 o 

 8 



I 



Percentage of 



seeds with 



ruptured 



coats 



6 

 10 



6 

 16 



8 



4 

 25 

 18 



8 

 44 

 23 



39 



12 



18 

 20 

 26 

 18 

 10 

 10 



34 

 10 



37 

 I 

 22 

 22 

 37 

 24 



15 

 21 



37 

 18 



2>2, 

 12 



24 



34 



7 



7 



14 



Total 



percentage 



of seeds 



affected 



23 

 28 

 21 



39 

 21 



25 

 53 

 31 

 32 

 48 

 47 

 53 

 26 



38 

 53 

 51 

 27 

 20 

 20 

 41 

 25 

 42 



42 

 22 

 22 

 38 

 26 

 28 

 21 

 44 

 27 

 43 

 21 



25 

 34 

 7 

 17 

 15 



One set was kept at 20° C. and a second at 30° C. The third set 

 was kept at 20° C. for 18 hours and at 30° C. for 6 out of every 24 

 hours. The air in the tubes was changed every second day. The 



