Traveling with the Atom

Allegheny College

Compiled by Glen E. Rodgers
Colleen Riley
Charles Ruggiero

Gallium, discovered by Lecoq, melts in the palm of your hand.
Paul Emile Lecoq de Boisbaudran
French chemist and spectroscopist
Optical spectra of a rare earth metal.

Contribution to the Development of the Atomic Concept
Lecoq discovered "Eka aluminum" (gallium) in 1875 four years after its existence was predicted by Mendeleyev and, therefore, proved the usefullness of the periodic table.  In addition to gallium Lecoq discovered samarium (1880), and dysprosium (1886).  Leqoc was also influential in advancements in spectroscopy and spectroscopic techniques, devoting much effort to the spectra of the rare earth metals.

Web Sources of Biographical Information
Biography of Lecoq de Boisbaudran
Accomplishments of Boisbaudran
Paper by Lecoq de Boisbaudran on discovery of gallium

Some Web Sources on the History of Atomic Scientists:
The History of Chemistry 1992 Woodrow Wilson Summer Institute
Selected Classic Papers from the History of Chemistry
Classic Papers from the History of Chemistry (and Some Physics too)
Classic Chemistry compiled by Carmen Giunta
History of Science website by Charlesworth
Center for the History of Physics
Echo Exploring & Collecting History Online
Atom: The Incredible World: The History of Atomistics
Nobel Prize WebPage
Biographies of Famous Chemists, University of Liverpool
University of Pennsylvania Biographies
Chemistry: A History
Famous Scientists greatly who contributed to "electro" science: electricity, electromagnetism,
electrical technology, electronics, electrical telegraphy, radio, electrochemistry, electromedicine, etc.
Elements and Atoms: Case Studies in the Development of Chemistry

Selected Biographical Books, Sections of Books, and Articles
Full biographical information on Sacks' book Uncle Tungsten 199-200, 202
Full biographical information on Asimov's Biographical Encyclopedia of Science and Technology 736 home page
Barnes and Noble home page

Some Scientific/Historical Traveling Sites
* see following Rodgers link to scientific/historical sites for further information.
(1) Taken from The Scientific Traveler, Charles Tanford and Jacqueline, John Wiley & Sons, NY (1992).
(2) Taken from A Travel Guide to Scientific Sites of the British Isles, Charles Tanford and Jacqueline Reynolds, John Wiley & Sons, NY (1995). (3) Taken from Guide of Eurpoean Museums with collections on History of Chemistry, compiled by Jan W. van Spronsen, Federation of European Societies, Antwerp (1996)

Links to Dr. Rodgers' Scientific/Historical Sites will be available here.

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