Summary:

This is a small note on the construction of isochronous curves in a resistant medium.

Publication:

• Originally published in Acta Eruditorum 1726, 1726, pp. 361-363
• Reprinted in Opusc. math. Act. erud. Lips. 6, 1746, pp. 579-581 [E1a]
• Opera Omnia: Series 2, Volume 6, pp. 1 - 3

• Original publication: E001
• Ian Bruce has made both a translation and transcription of E1 available at his page Mathematical Works of the 17th Century.
  
  
• The Euler Archive attempts to monitor current scholarship for articles and books that may be of interest to Euler Scholars. Selected references we have found that discuss or cite E1 include:
  • Calinger R., “Leonhard Euler: The first St Petersburg years (1727-1741).” Historia Mathematica, 23 (2), pp. 121-166 (May 1996).