Last Updated：2025/12/31
Sentence
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,
essentially
what
today
we
might
term
a
frameless
magnifying
glass
or
plain
glass
paperweight.
Scribes,
illuminators,
and
scholars
held
such
stones
directly
over
manuscript
pages
as
an
aid
in
seeing
what
was
being
written,
drawn,
or
read.
Quizzes for review
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, essentially what today we might term a frameless magnifying glass or plain glass paperweight. 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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