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I am studying the machine of Wilhelm Schickard and found lowtechmagazine.com to be a very intersting resource. Thank you for putting all that together!

However in this article there is something I do not understand.

The heading "1. Logarithms (1614-2008)"

mentions that Napier "invented" logarithms. But the picture shows one of his other inventions, the napier bones. I have a set of them, and quite well understand how Schickard integrated them into his machine. The bones and Schickards machine do not use logarithms at all.

Logarithms are a way of reducing one multiplication to one(!) addition, but it comes with a loss of precision. The machines reduce a multiplication to a series of addition without any loss of precision.

Further down the text says that "Napier bones and slide rules, both based on the concept of logarithms, were invented in the 17th century."

The time of invention is true, but that they should be based on logarithms is untrue, as far as I can tell. (the crossed out word 'algorithm' is also there, which is again something entirly different)

Attributing Logarithm to John Napier is correct. https://en.wikipedia.org/wiki/Napierian_logarithm has the details. Obviously unrelated to the bones.

I'd appreciate if you could add this distinctions to the website.

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