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Quick Search: (Enter name, year, or keyword) SAMPLE PREVIEW OF CALENDAR ENTRIES: History of Science Women in Medicine and Science History of Mathematics History of Chemistry |
Chronology of the History of Science |
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1911 AD |
Millikan measures charge of electron.
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1911 AD |
Hess studies cosmic rays using balloons.
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1911 AD |
Victor Hess, high altitude radiation from space
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1911 AD |
Rutherford announces theory of nuclear atom.
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1911 AD |
Ernest Rutherford infers the nucleus as the result of the alpha-scattering experiment performed by Hans Geiger and Ernest Marsden.
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1911 AD |
Ernest Rutherford explains the Geiger-Marsden experiment by invoking a nuclear atom model and derives the Rutherford cross section
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1911 AD |
Ernest Rutherford, Infers the nucleus from the alpha scatterin result
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1911 AD |
Ernest Rutherford infers the nucleus as the result of the alpha-scattering experiment performed by Hans Geiger and Ernest Marsden.
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1911 AD |
Kamerlingh-Onnes discovers liquid helium is a superconductor.
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1911 AD |
Amundsen reaches the South Pole.
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Aleksandrov,
A. Born: 8/5/1912 |
1912 AD | |
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1912 AD |
Pickard invented the crystal diode and crystal detector
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1912 AD |
Joseph Thomson, mass spectrometry and separation of isotopes
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1912 AD |
Henrietta Leavitt, period to luminosity relationship for Cepheid variable stars
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1912 AD |
Robert Millikan, measurement of Planck's constant
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1912 AD |
Peter Debye, derivation of specific heat laws to low temperatures
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1912 AD |
Charles Wilson, cloud chamber
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1912 AD |
Albert Einstein, curvature of space-time
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1912 AD |
Vesto Melvin Slipher, observes blue-shift of andromeda galaxy
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1912 AD |
Gustav Mie, non-linear field theories
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1912 AD |
ALEXIS CARREL in recognition of his work on vascular suture and the transplantation of blood-vessels and organs.
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1912 AD |
Institute of Radio Engineers (IRE) is formed.
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1912 AD |
Max Von Laue, X-rays are explained as electromagnetic radiation by diffraction
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1912 AD |
Albert Einstein explains the curvature of space-time.
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Luria,
Salvador Born: 8/13/1912 |
1912 AD | |
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1912 AD |
Institute of Radio Engineers (IRE) is formed.
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1912 AD |
Pieter Debye derives the T-cubed law for the low temperature heat capacity of a nonmetallic solid
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1912 AD |
Max von Laue suggests using lattice solids to diffract X-rays
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1912 AD |
Walter Friedrich and Paul Knipping diffract X-rays in zinc blende
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1912 AD |
Laue shows x-rays diffracted by crystals.
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1912 AD |
Bohr begins work on quantum theory of atom.
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1912 AD |
Albert Einstein explains the curvature of space-time.
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Kantorovich,
L. Born: 1/19/1912 |
1912 AD | |
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Turing,
Alan Born: 6/23/1912 Died: 6/7/1954 |
1912 AD | |
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Wu,
Chien-Shiung Born: 5/31/1912 |
1912 AD | |
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Gnedenko,
Boris Born: 1/1/1912 |
1912 AD | |
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Seaborg,
Glenn Born: 4/19/1912 |
1912 AD | |
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1913 AD |
Edison invented motion pictures with sound
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Lovell,
Bernard Born: 8/31/1913 |
1913 AD | |
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1913 AD |
Hans Geiger, relation of atomic number to nuclear charge
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1913 AD |
Niels Bohr, quantum theory of atomic orbits
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1913 AD |
Johannes Stark demonstrates that strong electric fields will split the Balmer spectral line series of hydrogen
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1913 AD |
Perrin measures size of atoms via Einstein's explanation of Brownian motion, finally confirms Dalton's atomic theory.
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1913 AD |
Stark finds strong electric field splits spectral lines.
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1913 AD |
Niels Bohr, radioactivity as nuclear property
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1913 AD |
Jean-Baptiste Perrin, theory of size of atoms and molecules
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1913 AD |
Henry Moseley shows that nuclear charge is the real basis for numbering the elements
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1913 AD |
Bragg and Bragg, X-ray diffraction and crystal structure
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1913 AD |
Niels Bohr presents his quantum model of the atom
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1913 AD |
CHARLES ROBERT RICHET in recognition of his work on anaphylaxis.
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1913 AD |
Frederick Soddy, the term "isotope"
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1913 AD |
Niels Bohr succeeds in constructing a theory of atomic structure based on quantum ideas.
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1913 AD |
Bohr published his model of the atom, based on energy states described by one quantum number
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1913 AD |
Johannes Stark, splitting of hydrogen spectral lines in electric field
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Flerov,
Georgii Born: 3/2/1913 |
1913 AD | |
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1913 AD |
Fajans and Gohring, element 91, protactinium
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1913 AD |
Barnack Oscar, Allemagne. Leica, Prototype
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1913 AD |
Ford added the assembly line to his automobile plant
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1913 AD |
Robert Millikan measures the fundamental unit of electric charge
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1913 AD |
William Bragg and Lawrence Bragg work out the Bragg condition for strong X-ray reflection
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1913 AD |
Geiger invents tube for measuring radiation.
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1913 AD |
Niels Bohr succeeds in constructing a theory of atomic structure based on quantum ideas.
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1914 AD |
Ernest Rutherford suggests that the positively charged atomic nucleus contains protons
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1914 AD |
Thomas J. Watson becomes President of Computing-Tabulating-Recording Company.
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1914 AD |
James Franck and Gustav Hertz observe atomic excitation
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1914 AD |
Thomas J. Watson becomes President of Computing-Tabulating-Recording Company.
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1914 AD |
ROBERT B-R-NY for his work on the physiology and pathology of the vestibular apparatus.
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1914 AD |
Rutherford, da Costa Andrade, gamma rays identified as hard photons
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1914 AD |
Ejnar Hertzsprung, measured distance to Large Magellanic Cloud using Cepheid variable stars
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1914 AD |
James Chadwick, primary beta spectrum is continuous and shows an energy anomaly
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Neumann,
Hannah Born: 2/12/1914 |
1914 AD | |
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1914 AD |
Mosley shows x-ray absorption edge of element a function of its atomic number.
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1914 AD |
Harry Moseley, used X-rays to confirm the correspondence between electric charge of nucleus and atomic number
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Brown,
Marjorie Lee Born: 9/9/1914 |
1914 AD | |
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1914 AD |
Rutherford suggests fundamental particle of positive charge is the proton.
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Hoyle,
Fred Born: 6/24/1915 |
1915 AD | |
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1915 AD |
Albert Einstein completes his theory of general relativity
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1915 AD |
David Hilbert, action principle for gravitational field equations
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1915 AD |
Albert Einstein, general relativity
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1915 AD |
Braggs [father and son] use x-rays to determine crystal structures.
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1915 AD |
Albert Einstein, prediction of light bending and explanation for perihelion shift of mercury
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1915 AD |
The prize money for 1918-1915 was allocated to the Special Fund of this prize section.
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1915 AD |
Albert Einstein completes his theory of general relativity
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1915 AD |
Albert Einstein completes his theory of general relativity
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Sanford,
Katharine Born: 7/19/1915 |
1915 AD | |
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1915 AD |
Arnold Sommerfeld develops a modified Bohr atomic model with elliptic orbits to explain relativistic fine structure
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1915 AD |
Einstein announces theory of general relativity.
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1916 AD |
Karl Schwarzschild solves the Einstein vacuum field equations for uncharged spherically symmetric systems
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1916 AD |
Sydney Chapman and David Enskog systematically develop a kinetic theory of gases
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1916 AD |
Lewis introduces theory of chemical bonding.
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1916 AD |
Albert Einstein shows that the field equations of general relativity admit wavelike solutions
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1916 AD |
Lewis proposed the idea of covalent bonds
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1916 AD |
Arnold Sommerfeld, Further atomic quantum numbers and fine structure of spectra, fine structure constant
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1916 AD |
Gilbert Lewis and Irving Langmuir formulate an electron shell model of chemical bonding
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1916 AD |
Albert Einstein, conservation of energy-momentum in general relativity
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1916 AD |
Albert Einstein, prediction of gravitational waves
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Crick,
Francis Born: 6/8/1916 |
1916 AD | |
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1916 AD |
Robert Millikan, verification of energy law in photoelectric effect
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1916 AD |
Karl Schwarzschild, singular static solution of gravitational field equations which describes a minimal black hole
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1917 AD |
Rutherford, Marsden, artificial transmutation, hydrogen and oxygen from nitrogen
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