Reprint of the original, first published in 1837.

A new translation of the treatise which inspired modern developments in logic and semantic theory.

Reprint of the original, first published in 1881.

The Art of Logic by Avi Sion is a collection of recent essays on various topics in logic theory and in applied logic. The same faculty and art of logic is called for in formulating theoretical logic and in applying its findings to diverse fields. The essays here collected deal with some very important issues in logic, philosophy, and spirituality, which he had not previously treated in as much detail if at all.