Nagasawa Kanaye Negative capability Thomas Newcomen
	Laurence Oliphant Opabinia regalis Opium Sir Richard Owen
	Pandaemonium: 1660-1886 Pandemonium Pantisocracy Pathetic fallacy Pepperbox Peyote A Philosophical View of Reform Pinkerton's National Detective Agency Pneumatic dispatch Poor Law of 1834 Positivism Potash Winthrop Praed Pre-Raphaelite Brotherhood Prince Albert Bryan Procter Protoceratops
	Quassia Quetzalcoatlus
	Radical Realism The Reform Act of 1832 The Revolutionary Epic The Richardson affair Roller-skates Romanticism
	Battle of San Jacinto Sand-hogs Anthony Sandys Sappers Sapping Satsuma The Satsuma preference Seiyoken Shimonoseki bombardment Statistical societies The Statistical Society of London Steam car Suez Canal Captain Swing Sybil, or The Two Nations
	Table Thames tunnel project The Great Exhibition of 1851 Felix Tournachon Tsukiji
	Uniformitarianism
	Clement Vallandigham
	The Duke of Wellington The West India Docks
	The Difference Dictionary was first published in slightly different form in Science Fiction Eye, Issue #8. Text © 1990, 1996, 2000, 2003 by Eileen K. Gunn.