Fixed bodies

those which can not be volatilized or separated by a common menstruum, without great difficulty, as gold, platinum, lime, etc.

See also: Fixed

References in periodicals archive ?
For, the place of A and B, is the same; whereas the relations of A to fixed bodies, is not precisely and individually the same, as the relation which B (that comes into its place) will have to the same fixed bodies; but these relations agree only.
This notion of civilizations as continuous, fixed bodies is often reflected in Huntington's language.