English translation of Helmholtz' paper: “On the Physical Significance of the Principle of Least Action” I am asking about an English translation of a Helmholtz paper: 

Ueber die physikalische Bedeutung des Princips der kleinsten Wirkung. Journal für die reine und angewandte Mathematik (Crelle's Journal), Volume 100, Issue 2, 1887, Pages 137-166, and Volume 100, Issue 3, 1887, Pages 213-222.

http://www.degruyter.com/view/j/crll.1887.issue-100/crll.1887.100.137/crll.1887.100.137.xml?format=INT. (Also see link and link.)
The title in English: On the Physical Significance of the Principle of Least Action.
Has it ever been translated (to English)?
 A: In English, I've only found this very limited translation by Yourgrau and Mandelstam.

From these facts we may even now draw the conclusion that the
  domain of validity of the principle of least action has reached far beyond the
  boundaries of the mechanics of ponderable bodies. Maupertuis’ high hopes for
  the absolute general validity of his principle appear to be approaching their
  fulfilment, however slender the mechanical proofs and however contradictory the
  metaphysical speculations which the author himself could at the time adduce in
  support of his new principle. Even at this stage, it can be considered as highly
  probable that it is the universal law pertaining to all processes in nature. . . . In
  any case, the general validity of the principle of least action seems to me
  assured, since it may claim a higher place as a heuristic and guiding principle in
  our endeavour to formulate the laws governing new classes of phenomena.


Perhaps useful for other readers is the full Russian translation in Полак, Л.С. (ред.), Вариационные принципы механики: Сборник статей классиков науки, 1959. There's a djvu file here. The file can be converted to pdf at, e.g., http://www.djvu-pdf.com/. The Russian-translated paper is at page 430ff (pdf-page 434ff).
A: I know this thread's ancient, but I had the exact same question and it looks like there's currently an English translation of this paper by D. H. Delphenic available here:
http://neo-classical-physics.info/uploads/3/0/6/5/3065888/helmholtz_-_physical_meaning_of_least_action.pdf
Archived here in case the link expires:
https://web.archive.org/web/20210506142203/neo-classical-physics.info/uploads/3/0/6/5/3065888/helmholtz_-_physical_meaning_of_least_action.pdf
A: In the book "Intellectual Mastery of Nature. Theoretical Physics from Ohm to Einstein, Volume 2: The Now Mighty Theoretical Physics, 1870 to 1925" you can find, on pages 131-134 some parts are translated.
