he child makes from day to day as
well as the results of trips that have previously been taken by some
members of the class. During the time that this book is used it is hoped
that at least two or three of the following field trips or excursions
may be made:

1. To uncultivated spots on hillsides, in the woods, and on natural
meadows to find--

(_a_) A place where the Tree-dwellers might have lived.

(_b_) Wild foods, and to discover if possible the reasons for
abundance or scarcity of certain forms.

(_c_) Trees that offer protection from the sun and rain, and branches
that are tough and strong.

(_d_) Suitable sticks for primitive implements and weapons.

(_e_) Grasses, barks, willows, rushes, and other tough and flexible
fibers for basketry.

(_f_) The topographical features which later are to be represented
in sand.

(_g_) What animals now live in uncultivated places.

2. To a brook or river to find--

(_a_) The best drinking-places for animals.

(_b_) The best fords.

(_c_) The best places to build bridges.

(_d_) Stones for primitive implements and weapons.

(_e_) How the river grinds the stones.

(_f_) What the river carries in its water.

(_g_) What plants and animals may be seen there.

3. To a circus to see the wild animals, so as to be better able to
realize what the animals that lived when the Tree-dwellers did were
like.

4. To a farm to find--

(_a_) What animals live there, how they are taken care of, and how
they differ from wild animals.

(_b_) What plants are cultivated on the farm and in the gardens, how
they are cultivated, and how they differ from the wild plants that
can be found in uncultivated spots.

5. To a gravel bed or stone quarry to find--

(_a_) What kinds of stone are there.

(_b_) How stone is quarried and what it is used for.

(_c_) A problem with reference to how the gravel bed or the stone
quarry was made.

SUPPLEMENTARY FACTS

The child asks many questions, some of which are difficult to answer.
Since what has been ascertained regarding the period during which the
Tree-dwellers lived is not contained in books that are generally
available, it has seemed best to present at this time such summarized
statements as will furnish the teacher with the facts that she may need.

ANIMAL LIFE

_Extinct Species._ Among the animals of the mid-Pleistocene period that
have since become extinct were the I