Periodic table (detailed cells)
Although precursors to this table exist, its invention is generally credited to Russian chemist Dmitri Mendeleev in 1869. Mendeleev invented the table to illustrate recurring ("periodic") trends in the properties of the elements. The layout of the table has been refined and extended over time, as new elements have been discovered, and new theoretical models have been developed to explain chemical behavior.
Emerald Tablet
C.G. Jung identified "The Emerald Tablet" with a table made of green stone which he encountered in the first of a set of his dreams and visions beginning at the end of 1912, and climaxing in his writing "Seven Sermons to the Dead" in 1916. Historians of science, Eric John Holmyard (1891–1959) and Julius Ruska (1867–1949) also studied the tablet in the twentieth century. Because of its longstanding popularity, the "Emerald Tablet" is the only piece of non-Greek Hermetica to attract widespread attention in the West.