A System of Logic, Ratiocinative and Inductive, Being a Connected View of the Principles of Evidence, and the Methods of Scientific Investigation. Two Volumes. London: Parker, 1862. Fifth Edition. Pp (1)xvi, 535; (2) xii, 550. Bound in full calf, spines with raised bands, compartments embellished in gilt, with itle labels to 2nd & 4th. School crest stamped in gilt to upper covers, with prize bookplate to front pastedowns. Minor scuffing but overall a very nice bright set.

First published by John W. Parker in 1843.

One of Mill’s most important works, System of Logic is ‘the first major installment of his comprehensive restatement of an empiricist and utilitarian position” (Encyclopedia of Philosophy).

The book is important in the philosophy of science and more generally, as it formulated the five principles of inductive reasoning that are known as Mill’s Method. It ran through many editions, established Mill’s philosophical reputation, and greatly influenced Venn, John Neville Keynes, Frege and Bertrand Russell.