And now the paper and plaster sphere is to be endued
with intelligence.
What may be called the artistical portion of globe-making here
commences. In the manufactory we are describing there are two skilled
workers, who may take rank as artists, but whose skill is limited, and
at the same time perfected, by the uniformity of their operations. One
of these artists, a young woman, who has been familiar with the business
from her earliest years, takes the polished globe in her lap, for the
purpose of marking it with lines of direction for covering it with
engraved strips, which will ultimately form a perfect map. The
inspection of a finished globe will show that the larger divisions of
longitude are expressed by lines drawn from pole to pole, and those of
latitude by a series of concentric rings. The polished plaster has to be
covered with similar lines. These lines are struck with great rapidity,
and with mathematical truth, by an instrument called a ‘beam compass,’
in the use of which this workwoman is most expert. The sphere is now
ready for receiving the map, which is engraved in fourteen distinct
pieces. The arctic and antarctic poles form two circular pieces, from
which the lines of longitude radiate. These having been fitted and
pasted, one of the remaining twelve pieces, containing 30 degrees, is
also pasted on the sphere, in the precise space where the lines of
longitude have been previously marked, its lines of latitude
corresponding in a similar manner. The paper upon which these portions
of the earth’s surface are engraved is thin and extremely tough. It is
rubbed down with the greatest care, through all the stages of this
pasting process. We have at length a globe covered with a plain map, so
perfectly joined that every line and every letter fit together as if
they had been engraved in one piece,—which, of course, would be
absolutely impossible for the purpose of covering a ball.
Public-domain text, read in full here on John Shaqi.
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