of its departments at the World's Fair at St. Louis: the life aboard
war-ships, the handling of big guns, army maneuvers, the life-saving
service, post-office workings, and, in fact, many branches of the
government service will be explained pictorially by this means.

Agents for manufacturers of large machinery will be able to show to
prospective purchasers pictures of their machines in actual operation.
Living, moving portraits have been taken, and by means of a hand machine
can be as easily examined as pictures through a stereoscope. It is quite
within the bounds of possibility that circulating libraries of moving
pictures will be established, and that every public school will have a
projecting apparatus for the use of films, and a stereopticon or a
mutoscope. In fact, a sort of circulating library already exists, films
or mutoscope pictures being rented for a reasonable sum; and thus many
of the most important of the world's happenings may be seen as they
actually occurred.

Future generations will have histories illustrated with vivid motion
pictures, as all the great events of the day, processions, celebrations,
battles, great contests on sea and land are now recorded by the
all-seeing eye of the motion-photographer's camera.

BRIDGE BUILDERS AND SOME OF THEIR ACHIEVEMENTS

In the old days when Rome was supreme a Caesar decreed that a bridge
should be built to carry a military road across a valley, or ordered
that great stone arches should be raised to conduct a stream of water to
a city; and after great toil, and at the cost of the lives of unnumbered
labourers, the work was done--so well done, in fact, that much of it is
still standing, and some is still doing service.

In much the same regal way the managers of a railroad order a steel
bridge flung across a chasm in the midst of a wilderness far from
civilisation, or command that a new structure shall be substituted for
an old one without disturbing traffic; and, lo and behold, it is done in
a surprisingly short time. But the new bridges, in contrast to the old
ones, are as spider webs compared to the overarching branches of a great
tree. The old type, built of solid masonry, is massive, ponderous, while
the new, slender, graceful, is built of steel.

One day a bridge-building company in Pennsylvania received the
specifications giving the dimensions and particulars of a bridge that an
English railway company wished to build in far-off Burma, above