Answer:
The watermark that Weyman was able to see is significant because it confirms it is from the 17th century.
That's a lot of questions but everything is a yes for me, anything else is an i I Don't Know
Until computers started to dominate science and technology in the early decades of the 20th century, virtually every measuring instrument was analog.
Many scientific instruments now measure things digitally (automatically showing readings on LCD displays) instead of using analog pointers and dials.
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