8 SEEDS 
a piece of wood or cork (5x 5x7 cm.) containing three 
small holes, float it in a liter can nearly full of water, and 
put the radicles of the three peas selected thru the holes 
so that they will extend into the water. Put up some- 
thing for the peas to climb on as they grow. Make two 
more drawings of the pea with both cotyledons; one 
when the lateral roots appear, and the other when the 
leaves appear. What is the effect of removing the coty- 
ledons? After you have arrived at a conclusion, add 
about Io c. c. of culture fluid to the water and watch the 
development of the plants for several weeks longer. 
Exp. 3: Plant several peas in perfectly dry sand. 
Examine them after four days. 
Results ; conclusions? 
Exp. 4, Class: On a piece ot slate about) 22a ne 
cm. lay a piece of carpet paper just large enough to cover 
it. Cut two strips of the same paper 3 cm. wide and 25 
cm. long; fold them in the middle, lengthwise, and cover 
the two longer edges of the carpet paper with them. 
Scatter a dozen or more sunflower seeds with the shells 
removed, some kernels of oats, and a little clover seed 
on the paper from end to end, and cover them with a 
glass plate as large as the slate. Use patent adjustable 
pinch cocks, test tube holders, or spring clothes pins to 
hold the plates together, and set one end of the plates into 
water approximately 2 cm. deep, so that they will be 
perpendicular to the surface of the water. Study this 
experiment from time to time for about a week. Results; 
conclusions? 
Exp. 5, Groups of Two: Mix fifty soaked peas 
with an equal amount of small pieces of moist 
