The Collaborative International Dictionary of English v.0.48:

Stahlian \Stahl"ian\ (st[aum]l"yan), a.
   Pertaining to, or taught by, Stahl, a German physician and
   chemist of the 17th century; as, the Stahlian theory of
   phlogiston.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Stahlian \Stahl"ian\, n.
   A believer in, or advocate of, Stahlism.
   [1913 Webster] Stahlism