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Doc. 205.] 27
SWEDENBORG’S TRAVELS IN 1733.
than in others, and thus make grooves in the glass. The
circle in the middle, where the hook of the machine is inserted,
is thus movable in all directions, and to one machine there
are in this way attached eighteen pairs of stones. 6. When
the plates of glass are to be polished, the coarsest kind of
sand is at first used, and for about eight days ; afterwards
another kind of coarse sand, a little finer than the first, is
used ; this also lasts for six or seven days; subsequently a
still finer sand; and at last the finest kind of white sand, which
is called Streusand ; each of these operations also requires
from five to six days. There are thus four stages in the
attenuation of the glass by means of the sand. This ought
not to be called a process of polishing, but rather of grinding.
7. After all this is finished, the same plates of glass are
polished by means of emery, which is of a red colour and of a
coarser substance. The plates of glass are placed for this pur
pose upon other similar stones and they are fastened to them in
a similar manner ; and by means of the same machine and by
the same reciprocal motion, i. e. by a continuous motion for
wards and backwards, the polishing is accomplished ; one glass
rubbing against the other by being laid upon it, and both
being polished at the same time. The emery is dissolved in
water, and by means of a sponge or the hand is poured upon
the lower plate of glass ; the upper plate is also during this
operation turned in all directions, so that the polishing is
performed lengthways and sideways, as well as in all other
directions. This work is usually accomplished in three days.
8. After the plates of glass have thus been worked upon and
attenuated, and polished for the first time, they are handed
over to women, who in a similar manner place two plates of
glass one upon the other and move them to and fro with their
right hands and arms, and this continuously for a whole
day, putting between the two plates a yellower and finer emery
which comes in the form of cones. 9. Lastly this plate under
goes another process of polishing ; it is placed in another but
similar machine, and during this last or sixth time a red earth
is interposed, which is called English earth; and seems to be
a sort of bole, of a red colour, but very fine, oily, and smooth.
The plate has this time a smaller top-plate applied to it,
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