on and a factory of missiles for the army. The cemetery of the
garrison has been excavated since 1873, and a large number of important
inscriptions, the majority belonging to the end of the 4th and the
beginning of the 5th centuries, have been discovered. It was taken and
destroyed by Attila in A.D. 452. Considerable remains of the ancient
town have been found--parts of the city walls, the sites of the forum
and the theatre, and probably that of the arms factory. The objects
found are preserved at Portogruaro, 1-1/4 m. to the N. The see of Concordia
was founded at an early period, and transferred in 1339 to Portogruaro,
where it still remains. The baptistery of Concordia was probably erected
in 1100.

See Ch. Hulsen in Pauly-Wissowa, _Realencyclopadie_, iv. (Stuttgart,
1901) 830. (T. As.)

CONCRETE (Lat. _concretus_, participle of _concrescere_, to grow
together), a term used in various technical senses with the general
significance of combination, conjunction, solidity. Thus the building
material made up of separate substances combined into one is known as
concrete (see below). In mathematics and music, the adjective has been
used as synonymous with "continuous" as opposed to "discrete," i.e.
"separate," "discontinuous." This antithesis is no doubt influenced by
the idea that the two words derive from a common origin, whereas
"discrete" is derived from the Latin _discernere_. In logic and also in
common language concrete terms are those which signify persons or things
as opposed to abstract terms which signify qualities, relations,
attributes (so J. S. Mill). Thus the term "man" is concrete, while
"manhood" and "humanity" are abstract, the names of the qualities
implied. Confusions between abstract and concrete terms are frequent;
thus the word "relation," which is strictly an abstract term implying
connexion between two things or persons, is often used instead of the
correct term "relative" for people related to one another. Concrete
terms are further subdivided as Singular, the names of things regarded
as individuals, and General or Common, the names which a number of
things bear in common in virtue of their possession of common
characteristics. These latter terms, though concrete in so far as they
denote the persons or things which are known by them (see DENOTATION),
have also an abstract sense when viewed connotatively, i.e. as implying
the quality or qualities in isolation from the individuals. The