presses in France. We reproduce in Fig. 1 a perspective view of the
Marinoni press, and in Fig. 2 a diagram showing the parts of the same.
In order to give a complete description of it, we cannot do better than
to reproduce the very interesting study that has been made of it by Mr.
Monet, a civil engineer.

[Illustration: FIG. 1.--MARINONI'S ROTARY PRINTING PRESS.]

The roller, J (Fig. 2), is placed in the machine in the state in which
it is received from the paper manufactory. The paper unwinds, runs over
the rollers, e and e', which serve only for tautening it, and then
passes between the two cylinders, A and B. The cylinder, A, carries the
form, and B carries the blanket, and the paper thus receives its first
impression. It afterward passes between the cylinders, A' and B', and
receives an impression on the other side, the cylinder, A', carrying the
form, and B' the blanket. Being now printed on both sides, it passes
between the cylinders, KK', which cut it off and allow the sheet to
slide between the cords of the rollers. These latter lead the sheets
over the rollers, g h, on which they wind, one over the other, when the
rollers, a a', are in the position shown by unbroken lines in the cut.

The part of the machine that holds the rollers, g h, and the different
cords that wind over them, is the _accumulator_, and it is in this part
of the press that the sheets accumulate, one over the other, to any
number desired.

The size of the rollers, g h, and their distance apart are so regulated
that when the sheet reaches the accumulator, it falls exactly on those
that have preceded it. When the proper number of sheets is in the
accumulator (4 or 5 being the number most employed for afterward