y Theory to develop "relation-
structures" of concepts, relations and higher order relations,
based entirely on experienced simple "qualities of feeling."
A relational algebra results which includes semantic nets as
relation-structures. In terms of this algebra we use Peirce's
"reduction theorem" in order to build a "foliation" of all
conceptual/relational-structures by means of levels ("sheets")
algebraically defined. This provides a canonical "normal form"
for networks of n-adic relations. This can be don