PLANTS 



(Chapter 12) 



1. Place a moist blotter or cloth upon a plate con- 

 taining several radish seeds. After a few days observe 

 the delicate root hairs on the roots of the germinating 

 seeds. 



2. Place a few grains of corn on a piece of marble 

 slab and cover them with soil two inches deep. After 

 ten days remove the plants and wash the marble. Notice 

 that the roots have dissolved a little of the marble. This 

 is done by means of carbon dioxide, which is supplied 

 from the roots. 



3. Fill two tin cans with the same kind of soil after 

 driving several small holes in the bottom of one of the 

 cans. Plant seed at the same depth in each and add water 

 until the soil is thoroughly moist. After several days 

 observe in which can the seeds have germinated more 

 quickly. What was wrong with the other can that the 

 seed did not germinate so w^ell ? 



4. In two tin cans with holes in the bottoms place the 

 same amount of soil and plant seeds. In one can 

 add much water and puddle the soil around the seeds. 

 Moisten the soil in the other can and keep it loose and 

 mellow. When the plants have begun to grow, what 

 difference do you observe? 



5. Plant tomato seeds in a small box of soil and keep 

 it in a warm room. Fill a number of small paper boxes 

 with soil at the same time, and plant two or three tomato 

 seeds in each. After the plants come up in the paper 



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