Construction of the stress tensor for a low differential order field t
heory on translation-invariant space is routine. If the underlying spa
ce is rotation, or Lorentz, invariant, an equivalent symmetric tensor
can be found as well. Extension to non local field equations, common,
for example, in the statistical mechanical theory of fluids, is not ro
utine and is carried out in this paper. (C) 1996 American Institute of
Physics.