This reference on Irish mathematicians includes biographies on: Thomas Harriot (1560-1621); William Rowan Hamilton (1805-1865); Robert Murphy (1806-1843); George Boole (1815-1864); George Gabriel Stokes (1819-1903); George Salmon (1819-1904); John Casey (1820-1891); William Thomson, Lord Kelvin (1824-1907); Henry John Stephen Smith (1826-83); Osborne Reynolds (1842-1912); Francis Ysidro Edgeworth (1845-1912); George Francis Fitzgerald (1851-1901); Edmund Taylor Whittaker (1873-1956); William Sealy Gosset, "student" (1876-1937); Walter Heitler (1904-81); David Robert Bates (1916-94); Andrew Young (1919-92); and Patrick Brendan Kennedy (1926-66).