ken from the whole page at one operation, by roller-presses
constructed for the purpose. The impression taken off in this manner
is as perfect as if it had been made in the finest wax. The matrix is
rapidly dried on heating surfaces, and then accurately adjusted in a
casting machine curved to the exact circumference of the main drum of
the printing press, and fitted with a terra-cotta top to secure a
casting of uniform thickness. On pouring stereotype metal into this
mould, a curved plate was obtained, which, after undergoing a certain
amount of trimming at two machines, could be taken to press and set to
work within twenty-five minutes from the time at which the process
began.

Besides the great advantages obtained from uniform sets of the plates,
which might be printed on different machines at the rate of 50,000
impressions an hour, or such additional number as might be required,
there is this other great advantage, that there is no wear and tear of
type in the curved chases by obstructive friction; and that the fount,
instead of wearing out in two years, might last for twenty; for the
plates, after doing their work for one day, are melted down into a new
impression for the next day's printing. At the same time, the original
type-page, safe from injury, can be made to yield any number of copies
that may be required by the exigencies of the circulation. It will be
sufficiently obvious that by the multiplication of stereotype plates
and printing machines, there is practically no limit to the number of
copies of a newspaper that may be printed within the time which the
process now usually occupies.

This new method of newspaper stereotyping was originally employed on
the cylinders of the Applegath and Hoe Presses. But it is equally
applicable to those of the Walter Press, a brief description of which
we now subjoin. As the construction of the first steam newspaper
machine was due to the enterprise of the late Mr. Walter, so the
construction of this last and most improved machine is due in like
manner to the enterprise of his son. The new Walter Press is not, like
Applegath and Cowper's, and Hoe's, the improvement of an existing
arrangement, but an almost entirely original invention.

In the Reports of the Jurors on the "Plate, Letterpress, and other
modes of Printing," at the International Exhibition of 1862, the
following passage occurs:--"It is incumbent on the reporters to point
out that, excellent and surp