LABORATORY MANUAL OF HORTICULTURE 



Now place the seeds in a Geneva seed-tester and germinate. 

 The second lot of seeds should be germinated untreated in the 

 same tester, under the same conditions, to serve as a check. 

 Tabulate your results and describe fully what takes place. Plot 

 a curve to show the increase in germination of seed that has 

 been treated over seed that has not been treated. 



Hypothesis 3. If you can set oxygen free, to unite with the 

 carbon of the seed and thus form carbonic acid gas, which must 

 pass off, germination will be hastened. 



a. Count out one hundred seeds each of the radish, cabbage, 

 and onion, and place each in a wide-mouthed bottle. Now cover 

 them with a 60 per cent alcoholic solution of iodine (approxi- 

 mately 1.1 per cent solution) and allow the seed to soak or be 

 kept moist with the solution until germination begins. Note the 

 time of sprouting. Tabulate your results to show the increase 

 in time. Discuss. 



6. Count out four lots of one hundred seeds each of the radish. 

 Place each lot in a bottle and keep the first moist with pure 

 water, the second with a 60 per cent alcoholic solution of iodine, 

 the third with a saturated solution of chlorine water (approxi- 

 mately 1.8 per cent), and the fourth with a 1 per cent solution of 

 monobromide of camphor. Describe fully what takes place and 

 tabulate your results. Plot a curve to show what effect the 

 different chemicals have on the germination of the radish seeds. 



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