E13 -- Curva tautochrona in fluido resistentiam faciente secundum quadrata celeritatum

(Tautochrone curves in a fluid making a second resistance proportional to the square of the speed)

Summary:

Publication:

Originally published in Commentarii academiae scientiarum Petropolitanae 4, 1735, pp. 67-89
Opera Omnia: Series 2, Volume 6, pp. 32 - 50
Reprinted in Comment. acad. sc. Petrop. 4, ed. nova, Bononiae 1743, pp. 57-76 + 1 diagram [E13a]

Documents Available:

Original publication: E013 (in the Commentarii), Volume 4
Ian Bruce has made both a translation and transcription of E13 available at his page Mathematical Works of the 17th Century.