EXPERIMENTS 9 
blotting paper and put them into a 50 c. c. wide mouthed 
bottle. Close the bottle loosely with a cork containing 
a hole large enough to pass a thermometer thru, and 
set the bottle into a 4 liter can. Cover the can loosely 
with a glass plate or a can cover. When the radicies 
of the peas are approximately 1 cm. long, partially re- 
move the cover of the can carefully, and take the temper- 
ature of the air in it and also of the peas by thrusting the 
thermometer into them without removing the bottle from 
the can. Likewise take the temperature on each of the 
three following days. The temperature should be read 
as late in the afternoon as nossible. Results; conclusions? 
Exp. 6, Groups ef Two: Carefully remove the shells 
from twelve sunflower seeds. Put six in each of two 
elean) bottles which’ hold 16 (to 20 ¢: ¢, “Partly. fill 
one of these bottles with tap water, but do not cork it. 
Fill the other bottle entirely with water that has been 
heated to the boiling point and then cooled without being 
shaken, and cork it air tight. (Note that much of the 
air in solution in the water is driven off by heating). 
Keep these bottles on your tables several days or longer. 
Results; conclusions? 
Msp. 72) ul a large, test-tube or’ 2) 50) ta; 75) & ‘: 
wide mouthed bottle which is comparatively tall, about 
half full of water; mark the level of the surface by tying 
a cord around the tube or bottle and then add 25 dry 
peas.. Be sure to remove all bubbles of air clinging to the 
peas, and then record the level of the water again. Set 
the peas aside for 24 hours and then note the level of the 
water. Pour the water and peas into a dish, return the 
water without the peas to the tube or bottle, and record 
