The Collaborative International Dictionary of English v.0.48:

Impartation \Im`par*ta"tion\, n.
   The act of imparting, or the thing imparted.
   [1913 Webster]

         The necessity of this impartation.       --I. Taylor.
   [1913 Webster]

WordNet (r) 3.0 (2006):

impartation
    n 1: the transmission of information [syn: conveyance,
         imparting, impartation]