y plunged into the forest, taking the direction
which Tom and Ralph had gone on the former trip_"
[See p. 235]]

Harry remembered. It resists moisture, and while it makes an excellent
paper would be difficult with their crude means to turn it out
satisfactorily. The grinding machine was a simple affair, and the fiber
was fed through again and again, until it was cut up into short lengths.

[Illustration: _Fig. 22. Paper Making Machine._]

The principal thing, however, in paper making is to get it the same
thickness. "It will take too long to make a cylinder, which makes the
paper even, and distribute the pulp perfectly, and in the absence of
that I have ordered an apparatus which will turn out a sheet at a time."

The Professor then exhibited a drawing, and continued: "Notice the box,
which is two feet square inside and two feet high. See this cleat all
around the inside, six inches from the top. That is to hold the frame of
a cloth web, which fits in the box exactly."

"At the bottom of the box is a pipe, right in the middle. This pipe is
for the purpose of carrying the water into the box. Below the box is a
larger box, and this contains the water which has the pulp mixed with
it, just enough of the pulp to make it look cloudy.

"The water in the box is carried into the box by the pump. When the
screen, or web, is placed in position, and the pump set to work, the
water, carrying the pulp, moves upwardly in the box, and the fine
particles of pulp are caught by the screen and held there, the little
fibers lying crisscross over each other.

"Every minute or so the screen with the paper mat on its underside must
be taken out and another put in, and the matted paper on each screen put
under a press, and the water squeezed out, after which it will readily
peel off the screen, and when it is dried it makes a good blotting
paper. To make a writing paper of it, the sheet must be run through a
number of heavily weighted steel rollers, but we don't need that for
printing our books."

The paper was made in that manner, and the Professor was delighted when
he saw the illustrations. Thus the first serious attempt was made to
begin the teaching of the children, and when the books were ready the
boys were all happy to undertake the work of teaching. It was here that
the Tuolo medicine men were utilized, and it may be said to their credit
that they found the new calling