The Queries

The Queries (or simply Queries) is the third book to English physicist Isaac Newton's Opticks, with various numbers of Query sections or "question" sections (up to 31, depending on edition), expanded on from 1704 to 1718, that contains Newton's final thoughts on the future puzzles of science. Query 31, in particular, launched affinity chemistry and the dozens of affinity tables that were made in the 18th century, based on Newton's description of affinity gradients.