Editing Charles Sanders Peirce (section)

==== Harvard observatory ====
From 1869 to 1872, he was employed as an assistant in Harvard's astronomical observatory, doing important work on determining the brightness of [[star]]s and the shape of the [[Milky Way]].<ref name="SP2">Moore, Edward C., and Robin, Richard S., eds., (1964), ''Studies in the Philosophy of Charles Sanders Peirce, Second Series'', Amherst: U. of Massachusetts Press. On Peirce the astronomer, see Lenzen's chapter.</ref> In 1872 he founded the [[The Metaphysical Club|Metaphysical Club]], a conversational philosophical club that Peirce, the future [[Supreme Court Justice]] [[Oliver Wendell Holmes Jr.]], the philosopher and  psychologist [[William James]], amongst others, formed in January 1872 in [[Cambridge, Massachusetts]], and dissolved in December 1872. Other members of the club included [[Chauncey Wright]], [[John Fiske (philosopher)|John Fiske]], [[Francis Ellingwood Abbot]], [[Nicholas St. John Green]], and [[Joseph Bangs Warner]].<ref>Menand (2001), p. 201.</ref>  The discussions eventually birthed Peirce's notion of pragmatism.