To add one more term to the Confusion of Confusions see also the original  
Palgrave entry "Production, Instruments of" by Rev. A. Caldecott (?).  There  
he writes "It was Say who gave attention to this distinction, and Hermann,  
Carl Menger and the Austrians have proceeded to elaborate it". (vol. iii, p.  
216).  
  
Nicholas J. Theocarakis