Source : Webster's Revised Unabridged Dictionary (1913)

Russia \Rus"sia\, n.
   A country of Europe and Asia.

   {Russia iron}, a kind of sheet iron made in Russia, having a
      lustrous blue-black surface.

   {Russia leather}, a soft kind of leather, made originally in
      Russia but now elsewhere, having a peculiar odor from
      being impregnated with an oil obtained from birch bark. It
      is much used in bookbinding, on account of its not being
      subject to mold, and being proof against insects.

   {Russia matting}, matting manufactured in Russia from the
      inner bark of the linden ({Tilia Europ[ae]a}).

Source : WordNet®

Russia leather
     n : a smooth leather tanned with willow, birch, or oak, and
         scented on the flesh side with birch oil