Last Updated：2022/12/24
The ability of a segment of a glass sphere to magnify whatever is placed before it was known around the year 1000, when the spherical segment was called a reading stone,[…]. Scribes, illuminators, and scholars held such stones directly over manuscript pages as an aid in seeing what was being written, drawn, or read.
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The
ability
of
a
segment
of
a
glass
sphere
to
magnify
whatever
is
placed
before
it
was
known
around
the
year
1000,
when
the
spherical
segment
was
called
a
reading
stone,[…].
Scribes,
illuminators,
and
scholars
held
such
stones
directly
over
manuscript
pages
as
an
aid
in
seeing
what
was
being
written,
drawn,
or
read.
