The Collaborative International Dictionary of English v.0.48:

Contemperation \Con*tem`per*a"tion\
   (k[o^]n*t[e^]m`p[~e]r*[=a]"sh[u^]n), n.
   1. The act of tempering or moderating. [Obs.] --Sir T.
      Browne.
      [1913 Webster]

   2. Proportionate mixture or combination. "Contemperation of
      light and shade." --Boyle.
      [1913 Webster]