M.G. MACHINES

243

The other method consists in leading the paper from the press back into
contact with the cylinder—which is revolving clockwise or in the same direction
as the wire—and in this case the under side of the web comes in contact with
the cylinder and receives the smooth finish.

The result of this method is that the under side of the paper though
'finished* has not the close and highly polished surface of the paper made by
the first method.

In order to modify the effects of these two arrangements and to suit the
particular paper to be made, recourse is had to felts of various qualities. These
felts, used to carry the web through the cylinder nip, are called 'overfelts',

PEG. 102.—ELBCTOC DSIYE HTTED DotEcr TO JOUINAI OF A LAMB M.G. CYLINDER
and may be had either rough, smooth, thick or thin, ribbed, striped or plain,
according to the effect it is desired to produce in die finished paper; they
are made of wool The finish obtained depends on a variety of circum-
stances, but chiefly on the surfke of the cylinder, as has been stated above.
The press roll which squeezes the web into contact with the cylinder is
worked by means of compound levers and weights, and it has to be very rigid
to stand the strain and prevent it from springing in the middle and thereby
reducing the pressure on the web.
Opinions differ as to the best position of this roll, but it is usually