On the Nature of Thought

Or, The act of thinking and its connexion with a perspicuous sentence

Thinking as a Science

Dr. Heidenhoff's Process

Thought-Culture; Or, Practical Mental Training

Studies in Logical Theory

Thinking and learning to think

Essays in Experimental Logic

Thought-Forms

An Investigation of the Laws of Thought

On which are founded the mathematical theories of logic and probabilities

How We Think