Letters relating to a Theorem of Mr. Euler, of the Royal Academy of   Sciences at Berlin, and F.R.S. for correcting the Aberrations in the   Object-Glasses of refracting Telescopes
  This paper contains a number of letters exchanged between MM. Dollond, Short, and Euler in 1752 regarding the construction and use of various objective lenses. The final letters, authored by Euler, appear in translation for the first time. This is numbered E210 in Enestrom's index. 
James Short, John Dolland, Leonhard Euler