or
gauges of different radii, for moulding-irons, etc. One has a square
face for plane-irons, chisels, etc. One is an emery hone to replace the
water-of-Ayr stone.

In examining the English locomotives exhibited two things were apparent:
one half of them have adopted the outside cylinders and wrist-pins on
the drivers, three out of four have comfortable cabs for the engineers.
These are, as we view them, sensible changes. Outside-cylinder engines
are also coming into extensive use in France. The machine tools shown by
Sharp, Stewart & Co. of Manchester are remarkably well made, and their
locomotive in the same space is an evidence of the efficiency of the
tools.

The exhibit of hydraulic-machine tools by Mr. R. H. Tweddell is a very
admirable one, and shows a multitude of stationary and portable forms in
which the idea is developed so as to reach the varying requirements.
When work is more conveniently held to the machines, the latter are
adapted to reach it whether presented vertically or horizontally, or
with one arm inside of it, as with boilers and flue-pipes. When it is
more convenient to handle the riveter, the latter is suspended from a
crane and swung up to its work, and the peculiarity of the various sizes
and shapes for different kinds of work is remarkable. The cut shows one
of the latest for riveting girders.

The Ingram rotary perfecting press, on which the _Illustrated London
News_ is worked off, prints from a web of paper of the usual length, and
is claimed as the final triumph in the line of inventors, which is thus
stated in England: Nicholson, Koenig, Applegarth and Cowper, Hoe and
Walter. We should be disposed to add a few names to the list, among
which would be Bullock and Campbell. A is the roll of paper, containing
a length of, say, two miles; B B the type and impression cylinders for
printing the inner form; C C calendering rollers to remove the
indentation of the inner form type; D D the outer form type and
impression cylinders; E E cylinders with a saw-tooth knife and an
indentation respectively to perforate the sheet between the papers; F F
rollers to hold the sheet while the snatching-rollers G G, which run at
an increased speed, break the paper off where it has been indented by E
E. The folder is in duplicate to give time to work, as each only takes
half the papers. The vibrating arm H delivers the sheets alternately to
K and J, which are carrying-tapes leading to two folding-machines. If