not Riemann, who anticipated some of the conceptual ideas of General Relativity." To explain the lack of recognition of Clifford's prescience, they point out that he was an expert in metric geometry, and "metric geometry was too challenging to orthodox epistemology to be pursued." In 1992, Farwell and Knee continued their study of Clifford and Riemann:[They] hold that once tensors had been used in the theory of general relativity, the framework existed in which a geometrical perspective in physics could be developed and allowed the challenging geometrical conceptions of Riemann and Clifford to be rediscovered. Selected writings 1872. On the aims and instruments of scientific thought, 524–41. 1876 [1870]. On the Space-Theory of Matter. 1877. "The Ethics of Belief." Contemporary Review 29:289. 1878. Elements of Dynamic: An Introduction to the Study of Motion And Rest In Solid And Fluid Bodies. Book I: "Translations" Book II: "Rotations" Book III: "Strains" 1878. "Applications of Grassmann's Extensive Algebra." American Journal of Mathematics 1(4):353. 1879: Seeing and Thinking—includes four popular science lectures: "The Eye and the Brain" "The Eye and Seeing" "The Brain and Thinking" "Of Boundaries in General" 1879. Lectures and Essays I & II, with an introduction by Sir Frederick Pollock. 1881. "Mathematical fragments" (facsimiles). 1882. Mathematical Papers, edited by Robert Tucker, with an introduction by Henry J. S. Smith. 1885. The Common Sense of the Exact Sciences, completed by Karl Pearson. 1887. Elements of Dynamic 2. Quotations See also Bessel–Clifford function Clifford's principle Clifford analysis Clifford gates Clifford bundle Clifford module Clifford number Motor Rotor Simplex Split-biquaternion Will to Believe Doctrine References Notes Citations Further reading (The on-line version lacks the article's photographs.) (See especially pages 78–91) Madigan, Timothy J. (2010). W.K. Clifford and "The Ethics of Belief Cambridge Scholars Press, Cambridge, UK 978-1847-18503-7. (See especially Chapter 11) External links William and Lucy Clifford (with pictures) Clifford, William Kingdon, William James, and A.J. Burger (Ed.), The Ethics of Belief. Joe Rooney William Kingdon Clifford, Department of Design and Innovation, the Open University, London. 1845 births 1879 deaths 19th-century deaths from tuberculosis 19th-century British philosophers 19th-century English mathematicians English atheists Algebraists British relativity theorists Alumni of Trinity College, Cambridge Fellows of Trinity College, Cambridge Alumni of King's College London Academics of University College London Fellows of the Royal Society Burials at Highgate Cemetery Second Wranglers Panpsychism Scientists from Exeter Tuberculosis deaths in Portugal Epistemologists