GROWTH OF SEEDLINGS 75 



of the following belongs: the beechnut, peach pit, acorn, 

 chestnut, horse-chestnut, pine, and maple. 



Suggestion. Plant onion seeds on wet blotting paper 

 and observe their interesting germination. 



Plant an assortment of seeds in pots of different soils 

 studied in the soil experiments. Is there any difference in 

 the time required for seeds in different soils ? 



Plant fresh date seeds and compare their germination 

 with cereals and other monocotyledonous plants. 



Visit a conservatory and look for germinating coconuts, 

 Brazil nuts, and vegetable ivory nuts. Some of these plants 

 are exceedingly interesting in their early growth. 



61. GROWTH 



Object. To show that the young plant exerts force in 

 coming up. 



Apparatus. Seeds, flowerpots of soil, covers of baking powder 

 boxes or other small trays, and a quantity of shot. 



Method. Plant the seeds three inches apart and place 

 over each a tray or tin box cover containing shot. Vary 

 the number in different trays and let the flowerpots stand 

 for several days. Do the young shoots lift all the trays? 

 Account for this result. What happens if the weight is 

 too heavy to lift ? 



Conclusion. Inference from this experiment. 



62. GROWTH 

 Object. Same as in Experiment 61. 



Apparatus. Small vial, shot, large glass, and a seedling just 

 breaking through the ground. The vial should be small enough 

 to slide easily in the glass tube. 



