LABORATORY MANUAL OF HORTICULTURE 



without heat ? In testing seeds do all of them germinate at the 

 same time ? Discuss the irregularity of seeds in germinating 

 when the same external conditions are given. Is a sprou ting- 

 chamber necessary in order to germinate seeds ? Discuss the 

 advantages gained by the rapid germination of seeds. 



2. Tabulate your results, and figure out the per cent of ger- 

 mination. This test should continue from a week to ten days, 

 but a week is usually sufficient for most seeds. Remove all of 

 the seeds as they germinate after the count has been tabulated. 

 Discuss fully what is gained by seed-testing. Discuss the three 

 essentials necessary for the germination of seeds. 



NOTE. I have found that the most convenient size of the Geneva seed-tester 

 for class use is eight inches wide, fourteen inches long, and three inches deep. 

 No. 12 wire makes a good size to support the cloth, and the length of the cloth 

 most convenient is four feet, containing ten pockets. In making the pockets, 

 enough Canton flannel should be allowed for the making of the seam, so that 

 the pocket may be at least one and one-half inches deep. Two or three such 

 cloths may be placed in each pan if necessary. 



REFERENCES : 



Bailey, " The Nursery Book," chap. i. 



Bulletin No. 35, Rhode Island Agricultural Experiment Station. 



Goff, "Principles of Plant Culture," pp. 24-32. 



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