Mediums, Skeptics, and William Crookes …. Oh My
William Crookes (1832-1919) was a physicist, chemist and member of the Royal Society (which is the oldest national science institution in the world) who contributed a great deal to science. Crookes is credited with the discovery of Thallium, being the first to identify helium, inventing sunglasses as well as other contributions to chemistry and physics such as vacuum tubes and the Spinthariscope (i.e. device used to study nuclear radioactivity) (Gay, 1996). Crookes was also t