Quantification of the Predicate, [195]–209; its application to the syllogism, [378]–84.

Quantity of Propositions, [91], 2; how affected by their quality, [95] n. ; of conditional propositions, [257], 8; of hypothetical propositions, [265].

Quaternio terminorum, [288].

Ramean Tree, [445].

Ray, P. K., [356] n.

Read, C., [62] n. ; [322] n.

Real Propositions, [49].

Reciprocal Equivalences, Schröder’s Law of, [472]; bearing of this law on the inverse problem, [534].

Reductio ad impossibile or per impossibile, [319].

Reduction of Dual Terms, [474], 5.