The X Club was a private British dining club of scientists which met from 1864 to 1892. The X Club was comprised of Joseph Hooker the botanist; T H Huxley a biologist; John Tyndall, a physicist; John Lubbock, a banker, ethnologist, and entomologist; William Spottiswoode, the Queen's Printer and an amateur mathematician; Edward Frankland, a chemist; George Busk, a retired surgeon, comparative anatomist, and microscopist; T A Hirst, a mathematician; and HerbertSpencer, a sociologist and philosopher of evolution. Research X Club
 
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