238 SPECIAL EXERCISES 



How many pistils ? Make drawing and show the parts. 

 What is its relation to the stamens ? 



Make drawing of pod, showing both outside and inside. 

 (Fig. 47.) 



17. Bean and Pea. Examine as many other beans and 

 peas as circumstances will permit. Compare the leaves, 

 method of climbing, flowers and seed pods. 



18. Bean and Pea Seedlings. Eeview your studies on the 

 bean. 



Plant a number of beans and peas. Note the methods of 

 germination and compare the seedlings from time to time for 

 a period of two or three weeks. Make drawings. 



19. Purity Test for Clover Seeds. Collect a number of 

 samples of clover seeds. One ounce of each is sufficient. 



Weigh out two or three grains of each very carefully. (Be 

 sure to use an accurate set of balances such as you will find in 

 the physical and chemical laboratories.) 



Spread this sample on a sheet of white paper. Examine 

 through a large lens or reading glass and remove (1) weed 

 seeds, (2) grass and other varieties of clover seed, (3) dirt and 

 other inert material. Weigh, and make and fill the following 

 table in your note-book. 



Name of Pupil 



No. of sample Kind of Seed 



Weight of Pure Seed Per cent of pure seed 



Weight of other clover and grass Per cent of other clover and grass 



seed seed 



Weight of weed seeds Per cent of weed seed 



Weight of inert material Per cent of inert material 



Total weight 



20. Germination of Commercial Seeds. Count 100, 200, 

 300, 400, or 500 seeds from preceding exercise. Germinate 

 these seeds between sheets of wet blotting paper. 



