Elements in plants, 66.

Elm tree leaf beetle, 117.

Endosperm, 78.
use of, 79.

Epicotyl, 78.

Essential organs of flowers, 131.

Evaporation, loss of water by, 54.
loss of heat by, 59.

Excursion,
to examine soils, 24.
to see plow cutting roots, 14.
to study roots, 11.
to study leaves, 108.
to study stems, 120.
to visit farm, 4.

Experiment to show,
air necessary for germination, 73.
amount of transpiration, 110.
capillarity, 49.
capacity of soils for film water, 51.
checking loss of water by evaporation, 55.
chlorophyl necessary for starch making, 113.