When 2 is emptied, 3 takes the first place in the series and so on. When
12 has been filled, it takes the l3th place. (The juice pipe returns
from the termination of the series, and connects with 1, making the
circuit complete.) The process is continuous, and the best and most
economical results are obtained if there is no intermission.

One cell should be filled and another emptied every eight minutes, so
that in twenty-four hours the number of cells diffused should be one
hundred and eighty.


WHAT HAS TAKEN PLACE IN THE DIFFUSION CELLS.

For the purpose of illustration, let us assume that when it has been
filled with chips just as much water is passed into the cell as there
was juice in the chips. The process of osmosis or diffusion sets in, and
in a few minutes there is as much sugar in the liquid outside of the
cane cells as in the juice in these cane cells; i.e., the water and
the juice have divided the sugar between them, each taking half.

Again, assume that as much liquid can be drawn from 1 as there was water
added. It is plain that if the osmotic action is complete, the liquid
drawn off will be half as sweet as cane juice. It has now reached fresh
chips in 2, and again equalization takes place. Half of the sugar from 1
was brought into 2, so that it now contains one and a half portions of
sugar, dissolved in two portions of liquid, or the liquid has risen to
three quarters of the strength of cane juice. This liquid having three
fourths strength passes to 3, and we have in 3 one and three fourths
portions of liquid, or after the action has taken place the liquid in 3