The Collaborative International Dictionary of English v.0.48:

Halomancy \Hal"o*man`cy\ (h[a^]l"[-o]*m[a^]n`s[y^]), n.
   See Alomancy.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Alomancy \Al"o*man`cy\, n. [Gr. ?, salt + -mancy: cf. F.
   alomancie, halomancie.]
   Divination by means of salt. [Spelt also halomancy.]
   --Morin.
   [1913 Webster]