The Principles of Science: A Treatise on Logic and Scientific Method

ABC Abc abCD abcD analogy apparent arise assert body calculation cause character classification colour consists Contrapositive crystals deductive deductive reasoning density detect discovered discovery disjunctive proposition earth effect electricity equal equation equivalent error exactly exist experiment expression fact force give gravity heat hypothesis identity induction inference infinite instance inverse inverse logical investigation J. S. Mill James Bernoulli knowledge Laws of Identity laws of nature Laws of Thought light Logical Alphabet logical conditions logicians magnetic mammæ manner mathematical matter mean measure metal method mode motion negative Newton number of combinations objects observation pendulum phenomena Philosophical planets possible premises principle principle of substitution probability problem properties proposition qualities quantity reasoning refraction regards relation scientific similar simple specific gravity stars substances substitution supposed syllogism symbols temperature theory things tion triangle true truth velocity