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Dunsany, Lord

Logic, like whiskey, loses its beneficial effect when taken in too large quantities.

In J. R. Newman (ed.) The World of Mathematics, New York: Simon and Schuster, 1956.

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Loci: Convergence

Van Schooten's Ruler Constructions

by C. Edward Sandifer

Thrid Solution to Problem I

Van Schooten writes

 

And another way.  Assume, as before, AD equals AB, that BD are joined, and that BE equals BA.  And from E through D an indefinitely long straight line is drawn.  In that, if DF is put, equal to DE, and from F through H [sic.  should be A] is drawn FAf:  I say that this bisects the angle BAC.

 

 

 

Branch point

        Fourth (and last ) solution to Problem I

        Problem II.

 

 

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