taken into full account
in considering the paper-making value of this material, although it
should be recognized that investigation may result in the material
improvement of these conditions. Moreover, it is not at all improbable
that further investigation would develop more satisfactory treating
conditions and more suitable furnish compositions, and the belief in
this possibility is strengthened by the fact that material progress was
being made at the conclusion of this preliminary work.

Calculations on the raw material and acreage for a permanent supply for
a pulp mill producing 25 tons of fiber a day for 300 days per annum, or
7,500 tons per annum, give the comparison between hurds and wood shown
in Table II.

TABLE II.--_Comparison between wood and hemp hurds._

-----------+-------------+--------------+-----------+--------------------
| | | | Acres required for
| | | | sustained supply.
| | | |---------+----------
| | Raw material | Annual | |
Material. | Pulp yield. | required per | growth | For | For 1 ton
| | year. | per acre. | 25-ton | of fiber
| | | | mill. | per year.
-----------+-------------+--------------+-----------+---------+----------
Wood | Two cords | 15,000 cords | 0.37 cord | 40,500 | 5.4
| yield 1 ton | | (about | |
| of fiber. | | 0.55 ton).| |
| | | | |
Hemp hurds | One ton | 25,000 tons | 2.5 tons | 10,000 | 1.33
| yields 600 | | | |
| pounds | | | |
| of fiber. | | | |
-----------+-------------+--------------+-----------+---------+----------

The most important point derived from this calculation is in regard to
areas required for a sustained supply, which are in the ratio of 4 to 1.
Every tract of 10,000 acres which is devoted to hemp raising year by
year is equivalent to a sustained pulp-producing capacity of 40,500
acres of average pulp-wood lands. In other words, in order to secure
additional raw material for the production of 25 tons of fiber per day
there ex