Mathematicians Of The Day

29th January

On this day in 1670, James Gregory wrote to John Collins:
Mr Barrow, in his Optics, showed himself a most subtle geometer, so that I think him superior to any that ever I looked upon: I long exceedingly to see his geometrical lectures, especially because I have some notions upon that same subject by me. I entreat you to send them to me presently as they come from the press, for I esteem the author more than you can easily imagine.

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Quotation of the day

From Bernard Lamy
A discourse is beautiful when it is composed according to the Rules of Art; it is great when it is more than ordinary perspicuous; when there is not one equivocation; no sentence unintelligible; no expression ambiguous; when it is well-disposed, and the mind of the Reader led directly to the end of the design, without the remora or impediment of impertinent words. Such clearness like a Torch dispels all obscurity and makes every thing visible.
De l'Art de parler (1675)