"Oh, yes," said Susie. "See if you can find one, Don. I put lots in."

Down on their knees went Susie and Donald, and began digging in the
soil.

"Here is one," said Donald, "just ready to come up, and another close to
it. The tip of it must have been through. See, it is green."

"Wouldn't it be green in the ground?" asked Susie, looking closely at
the tiny plant.

"Why, no," said Donald. "Things are never green when they're covered up.
It's light that makes things green. Don't you know how yellow the grass
gets if a board lies on it, and what yellow stalks the potatoes have
when they sprout in the cellar? It must be the light that makes them
green."

"Oh, yes," said Susie. "But see how big that pea is! It's about twice as
big as it was when I planted it."

[Illustration: Sprouting pea.]

"See," said Donald, "the roots grow from the same place that the stem
does. I should think it would be better if one came from one side of the
pea, and one from the other."

"What becomes of the rest of the seed?" asked Uncle Robert.

"I don't know," said Susie. "Is it of any use?"