12 SEEDS 
in the bottom. Insert a thermometer into the bottle 
containing the peas and see that the bottle is air tight. 
Raise the temperature to 24 degrees C. by firmly grasp- 
ing the bottle in the hand, and then record the level of 
the water in the test-tube. Twenty-four hours later 
raise the temperature to 24 degrees C. again and record 
the level of the water. Has the volume of the gas in 
the bottle changed? Conclusion? 
Exp. 11, Groups of Four: Select a tall wide mouthed 
bottle and put 25 peas into it after they have) been 
in water 12 to 24 hours. Lay the bottle over and dis- 
tribute the peas equally along the side from top to bot- 
tom. Now cover them with a strip of moist blotting 
paper and fill the bottle with moist sand, packing it 
enough to hold the seeds in place as you put it into the 
bottle, and set it into a depth of about 6 cm. of running 
hydrant water, or water kept cold with ice. As soon as 
the peas begin to germinate, insert a thermometer into 
a hole in the soil near the peas and ascertain the tem- 
perature of the lowest peas germinated. 
Some students will use soaked corn, others soaked 
wheat, clover, or beans, in place of peas, but every stu- 
dent will take note of all the experiments. Results; 
conclusions ? 
Exp. 12, Class: Procure a thin glass flat bottom 
dish approximately 2 cm. deep, and a large flat cork to 
fit it. Fasten the shaft of a clinostat to the center of 
the larger flat surface of the cork and cover the opposite 
surface of the cork and the sides of the dish with blot- 
ting paper. Select six peas with straight radicles 5 to 
Io mm. long and fasten three to the cork near the perifery 
