GERMINATION OF SEEDS 251 



What is your conclusion as to the effect of temperature on 

 the germination of seeds? 



Arrange two other cups as in the first experiment, but 

 in one put dry blotting paper and dry seeds. Place these 

 side by side in a warm place. What is your conclusion as 

 to the effect moisture has on germination? 



Arrange two cups as in the first experiment. Set them 

 side by side in a warm place. Leave one open to the light. 

 Cover the other so that the seeds will be in total darkness. 

 Is light necessary for germination ? 



Arrange two cups as above. In one place the seeds on 

 moist blotting paper. Fill the other full of water. What 

 do the seeds lack that are covered with water ? Can they 

 germinate without air? Test this in another way. Pro- 

 cure two wide-mouthed bottles of the same size. Fill each 

 full of water and drop some dry sand into the water till it 

 stands an inch from the bottom in one and within an inch 

 of the top in the other. Let it stand till the sand has 

 settled, then pour off the surplus water and drop into each 

 five seeds. Put in stoppers and cover with melted paraf- 

 fin or vaseline to keep out air. Which bottle contains 

 more air ? Note carefully to see if the amount of air 

 affects germination. 



Does the method of planting seeds have any effect on 

 germination ? 



Plant some corn in a pot or can in very loose soil. 

 Plant the same number of grain in another can, but in. this 

 one firm the soil down on the seeds with your hand. 

 Watch carefully to see which germinates first. Place some 

 moist soil one half inch deep in a two-quart Mason jar or 

 a deep candy jar; close to the glass on one side plant a grain 



