Template:Are You Sure/October 24
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![](/w/images/thumb/2/2a/Newton_notes_-_letter_to_Leibniz.png/200px-Newton_notes_-_letter_to_Leibniz.png)
Notes by Isaac Newton pertaining to his letter to Leibniz.
• ... that minister, scholar, astronomer, mathematician, cartographer, and inventor Wilhelm Schickard Schickard designed and built calculating machines; and that he also invented techniques for producing improved maps?