Image: Periodic table in the style of a space lemniscate william crookes slide

Description: Periodic table in the style of a space lemniscate Dates to 1898 (Original design by Sir William Crookes (1832-1919)) Slide circa 1957 (Date attributed to slide based on publication in Edward G. Mazurs Types of Graphic Representation of the Periodic System of the Elements (1957). No copyright renewal. Top and perspective views of a graphic representation of the periodic table of chemical elements in the style of a space lemniscate. This table was originated by British chemist and physicist Sir William Crookes (1832-1919) in 1898 and and classified by Mazurs as Type IIA1-2 in his seminal work Types of Graphic Representation of the Periodic System of Chemical Elements (1957). This illustration appears as Figure 43 on page 119 of Mazurs' 1957 publication.
Title: Periodic table in the style of a space lemniscate
Credit: https://digital.sciencehistory.org/works/pg15bf40t
Author: Sir William Crookes (1832-1919); Edward G. Mazurs (1894–1983)
Permission: This work is in the public domain because it was published in the United States between 1926 and 1963 and although there may or may not have been a copyright notice, the copyright was not renewed. For further explanation, see Commons:Hirtle chart. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.
Usage Terms: Public domain
License: Public domain
Attribution Required?: No