Is the following spelling containing long 'S's (used in Middle French) correct? enter image description here

  • Welcome. Please provide the source where you found this
    – user6768
    Jan 30, 2016 at 8:31
  • This is from Descartes' Discours de la méthode.
    – user132181
    Jan 30, 2016 at 8:37
  • What makes you suspect it is incorrect?
    – jlliagre
    Jan 30, 2016 at 8:55
  • @jlliagre because I don't speak a word of French (especially Middle French).
    – user132181
    Jan 30, 2016 at 9:05
  • 3
    @jlliagre I should have written, "antique type-ſetting", then.
    – ChrisW
    Jan 30, 2016 at 13:36

1 Answer 1


The spelling is very correct. It didn't change since when this famous sentence was coined by Descartes in 1637 (later cogito ergo sum in 1644).

The typography matches what was used it that time. Only the final S has its current shape while the other ones are using the now obsolete long variant.

  • That is old fashioned typeface where the s looks like an f. Je pense donc je suis: I think therefore I am. In Latin, yes: Cogito ergo sum.
    – Lambie
    Jan 30, 2016 at 17:12

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