Knowledge is power : $b A view of the productive forces of modern society and the results of labor, capital and skill.Knight, Charles
Philosophy
Knowledge is power : $b A view of the productive forces of modern society and the results of labor, capital and skill.
Knight, Charles
Industrial arts; Industries
The wooden ball, with its solid paper covering, is placed on its axis. A
sharp cutting instrument, fixed on a bench, is brought into contact with
the surface of the sphere, which is made to revolve. In less time than
we write the pasteboard ball is cut in half. There is no adhesion to the
wooden mould, for the first coating of paper was simply _wetted_. Two
bowls of thick card now lie before us, with a small hole in each, made
by the axis of the wooden ball. But a junction is very soon effected.
Within every globe there is a piece of wood--we may liken it to a round
ruler--of the exact length of the inner surface of the sphere from pole
to pole. A thick wire runs through this wood, and originally projected
some two or three inches at each end. This stick is placed upright in a
vice. The semi-globe is nailed to one end of the stick, upon which it
rests, when the wire is passed through its centre. It is now reversed,
and the edges of the card rapidly covered with glue. The edges of the
other semi-globe are instantly brought into contact, the other end of
the wire passing through its centre in the same way, and a similar
nailing to the stick taking place. We have now a paper globe, with its
own axis, which will be its companion for the whole term of its
existence.
The paper globe is next placed on its axis in a frame, of which one side
is a semicircular piece of metal;--the horizon of a globe cut in half
would show its form. A tub of white composition, a compound of whiting,
glue, and oil, is on the bench. The workman dips his hand into this
"gruel thick and slab," and rapidly applies it to the paper sphere with
tolerable evenness; but as it revolves, the semicircle of metal clears
off the superfluous portions. The ball of paper is now a ball of plaster
externally. Time again enters largely into the manufacture. The first
coating must thoroughly dry before the next is applied, and so again
till the process has been repeated four or five times. Thus, when we
visit a globe-workshop, we are at first surprised at the number of white
balls, from three inches in diameter to three feet, which occupy a large
space. They are all steadily advancing towards completion; and as they
advance to the dignity of perfect spheres, increased pains are taken in
the application of the plaster. At last they are polished. Their surface
is as fine and hard as ivory. But beautiful as they are, they may, like
many other beautiful things, want a due equipoise. They must be
perfectly balanced. They must move upon their poles with the utmost
exactness. A few shot, let in here and there, correct all
irregularities. And now the paper and plaster sphere is to be endued
with intelligence. The sphere is marked with lines of direction for the
purpose of covering it with engraved slips. We have now a globe with a
plain map. An artist colours it by hand.
Public-domain text, read in full here on John Shaqi.
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