(h) Hold your fingers so that it will touch a tendril for five 

 minutes. What happens? Use a stick or lead pencil in the same way. 



(i) When the fing'er or stick is removed does the tendril continue 

 to curl up? Why? 



(j) Does it ever straighten out again? 



(k) Try one of the old tendrils. Cut it loose and see if it wfU 

 uncurl again. Why will it not? 



6. Nail a little stick just out of reach of one of the tendrils and 

 watch what happens. 



(a) Does the plant grow straight towards the stick? 



(b) Does the plant act the same as if the stick were not there ? 



(c) Is there any attraction in the stick for the plant? 



i.e., has the stick anything to do with making the plant twine around it? 

 (d) If there is no attraction between the stick and the plant, why 

 is it the tendrils finally attach themselves to the stick? 



X. Living Plants at Work. 



The following simple experiments should be carried out whenever 

 practicable, and their significance determined : 



1. Place some soaked beans between two portions of damp carpet 

 felt or thick blotting paper in a plate. Cover the whole with another 

 plate placed upside down, and leave in a warm place. Examine every 

 day, and observe any changes. 



2. When some of the seeds have sprouted, mark off on the root 

 and stem with India ink, commencing at the tip, very short equal spaces. 

 Replace seedlings in the damp paper between the plates. Examine 

 every day. 



3. Grow some seedlings in the dark. 



4- Tie carefully a piece of moist bladder membrane over the end 

 of the bulb of a thistle tube, fill the bulb and part of the stem with 

 a strong syrup of sugar, and place the whole bulb end down in a jar 

 of water, taking care to have liquids at same level in stem and jar. 



5. Scoop cavities in a carrot and sugar beet, dry carefully and fill 

 with dry sugar. Set aside for a day or two. 



6. Place thin slices of sugar beet in separate vessels of water and 

 10 per cent, solution of salt. 



7. Place thin slices of red mangel, which have been boiled for a 

 few minutes, in a dish of water. 



8. Tie some rubber cloth or oiled paper about the pot in which 

 geranium plant is growing and cover the whole with a glass or bell-jar. 



9. Cut a shoot of geranium or begonia and place the cut end in 

 a bottle of water colored with red ink. Leave for a few hours, and 

 determine what parts of the stem are stained. Use a magnifying gTass. 



