1925

1925

in Tags

Bell Labs (Bell Telephone Laboratories, Inc.) is founded in New York, responsible for countless scientific and technological discoveries of the 20th century.

1925

1925

in Tags

AT&T’s Long Lines Department offers fax service between New York, Chicago, and San Francisco.

1924

1924

in Tags

United States. The Johnson-Reed Act limited the percentage of Jews who could immigrate to the United States to 2%. This drastically reduced the number of Jews arriving (1.1 million had arrived and settled in New York between 1881 and 1910). The Johnson-Reed Act remained in effect until 1965, when the Immigration and Nationality Act abandoned the quota system to introduce criteria for family reunification, political and war refugees, and professional skills.

1924

1924

in Tags

Stalin comes to power in the Soviet Union. The purges and deportations he carries out affect 70 million people and kill 20 to 30 million over 30 years.

1924

1924

in Tags

The first disposable paper handkerchiefs were marketed under the name Kleenex. They were invented by Bert Fourtness of the American company Kimberly Clark, based on the patented Cellucotton material, already used by Kimberly Clark for feminine hygiene products.

1924

1924

in Tags

Modena. The Cinema Principe opens in front of the Monumental Temple. The cinema is dedicated to Crown Prince Umberto of Savoy.

1924

1924

in Tags

Louis De Broglie, a young doctoral student at the Sorbonne in Paris, proposed, in a doctoral thesis of just three pages, that it should be possible to observe diffraction and interference in the wave motion of free electrons, just as they can be observed in light. The professors were ready to reject the student due to the paucity and absurdity of the thesis, until someone took the trouble to ask Albert Einstein for his opinion. Einstein replied that the student did not deserve a doctorate but rather the Nobel Prize (which he actually received five years later, in 1929).

1924

1924

in Tags

Satyendra Nath Bose and Albert Einstein predict that at extremely low temperatures atoms must condense into a single quantum state (later called the Bose-Einstein state)

1924

1924

in Tags

At a seminar given by Erwin Schrodinger, on the thesis of the wave nature of electrons, a member of the audience observes that if electrons behave like waves they must have an equation that describes them; Erwin Schrodinger is inspired to develop the Wave Function psi(x,t)

1924

1924

in Tags

Several Rocket Societies are being formed in Russia in the wake of enthusiasm for space exploration.

1924

1924

in Tags

The Computing-Tabulating-Recording Company becomes International Business Machines; Thomas J. Watson, president of the company, succeeds founder Herman Hollerith.

1924

1924

in Tags

Australian Raymond Dart of the University of the Witwatersrand in Johannesburg receives the first complete skull of an Australopithecus africanus.

1924

1924

in Tags

The young (12-year-old!) Wernher von Braun performs his first experiment with rockets: 6 large rockets push the wheeled cart on which Wernher sits; his older brother Sigismund helps him with the “project”.

August 16, 1924

August 16, 1924

in Tags

The leading opposition figure in Italy, the socialist Matteotti, is assassinated; one of those responsible is identified as a close collaborator of Mussolini, who has him expelled from the party; due to the murder, the fascist government goes through a serious crisis for the next six months.

June 27, 1924

June 27, 1924

in Tags

Mormon founder assassinated. American Joseph Smith, founder of the Mormon faith, was killed by a hostile mob while in prison in Illinois. In his ‘Book of Mormon,’ Smith had claimed to be the prophet of the last true church, that American Indians were descendants of the tribes of Israel, and that Jesus had come to preach in America after his resurrection. Disliked for unorthodox practices such as polygamy, Smith and his followers were persecuted throughout the eastern United States. To protect them from persecution, Brigham Young, Smith’s successor, led the Mormon exodus in 1846, following in the footsteps of pioneer wagon trains. In July 1847, the Mormons settled near the Great Salt Lake in Utah, where they founded Salt Lake City.

March 1924

March 1924

in Tags

In a Munich beer hall, Hitler gathers two thousand followers and begins a march following a communist uprising; the demonstration is broken up by the police, Hitler is arrested, and the Nazi Party is declared illegal.

March 3, 1924

March 3, 1924

in Tags

Turkey. Mustafa Kemal Ataturk abolishes the caliphate. Religious courts are abolished, and Sharia law is replaced by a civil code based on the Swiss model. It will be reestablished in parts of Syria and Iraq the following century by Caliph Al Baghdadi in June 2014, after 90 years.

1924

1924

in Tags

Russia. Kronstadt sailors attempt a riot. Once the uprising is quelled, the insurgents are lined up on the pier. “Count yourself!” The odd numbers step forward and are shot on the spot. The even numbers will receive 10 years in the Gulag in Kholmogory. After several escape attempts, a military unit is sent. The camp director commits suicide. And the surviving sailors are transferred to the special-regime camp on the Solovki Islands.

1924

1924

in Tags

Soviet Union. Following the divide-and-conquer policy, Soviet Central Asia, or Turkestan, was divided into five republics belonging to the USSR: Kazakhstan, Khyber Pakhtunkhwa, Turkmenistan, Tajikistan, and Uzbekistan, the borders completely unnatural and arbitrary. Islam was banned, Arabic schools were closed, and local languages were henceforth written in Cyrillic rather than Arabic.

1924

1924

in Tags

ACMA (Anonima Costruzione Macchine Automatiche) was founded in Bologna for the production of packaging machines.

1924

1924

in Tags

The Indian Citizenship Act passed by the U.S. Congress and President Calvin Coolidge. The law automatically made Native Americans, or the tens of thousands of surviving people of the millions who populated North America when the Mayflower landed.

November 1923

November 1923

in Tags

Guglielmo Marconi is acquitted of charges related to the 1921 bankruptcy of the Banca Italiana di Sconto, of which he was president. However, his assets had previously been frozen, and Marconi is left bitter. He decides to sail with his yacht, Elettra, to Canada and the United States to find spiritual peace and distraction in wealthy America.

October 6, 1923

October 6, 1923

in Tags

Hubble finds Cepheids (variable stars) in Andromeda and is thus able to determine that it is located a million light years away, therefore outside our galaxy and three times further away than the size of the universe as estimated up to that point.

September 1923

September 1923

in Tags

Zurich. A young (only 19 years old) John von Neumann began his PhD at ETH Zurich. According to his friend Theodore von Kármán, von Neumann’s father wanted John to pursue industry and thus invest his time in a more financially worthwhile endeavor than mathematics. Indeed, his father asked von Kármán to persuade his son not to pursue mathematics as his major. Von Neumann and his father decided that the best career path was to become a chemical engineer. This wasn’t something von Neumann had much knowledge of, so he was assigned a two-year undergraduate chemistry course at the University of Berlin (TU Berlin), after which he took the entrance exam to the prestigious ETH Zurich, which he passed in September 1923. At the same time, von Neumann also entered Pázmány Péter University in Budapest as a PhD candidate in mathematics. For his thesis, he chose to produce an axiomatization of Cantor’s set theory. He graduated as a chemical engineer from ETH Zurich in 1926 and passed the final examinations (at just 22 years old) for his PhD in mathematics simultaneously with his master’s degree in chemical engineering, of which Wigner wrote: “A doctoral thesis and an examination evidently did not constitute a worthwhile effort.” He then went to Göttingen to study mathematics under David Hilbert.

1923

1923

in Tags

Mars launches the Milky Way chocolate bar and its turnover increases from 100,000 to 700,000 USD; the previous year it had launched the Mar-O-Bar in Minneapolis without much market success.

August 2, 1923

August 2, 1923

in Tags

Washington, D.C., United States. President Harding dies of a sudden heart attack. His friend Thomas Alva Edison attends the funeral in Marion, Ohio, and later visits Milan, Ohio, his birthplace.

June 15, 1923

June 15, 1923

in Tags

Guglielmo Marconi joined the National Fascist Party (PNF), the Fascist Party of Milan. Marconi wrote, “out of conviction, not convenience.” His membership was dictated by the search for order and discipline, by faith in the future and progress, by strong nationalism, and by his personal friendship with D’Annunzio. Marconi died a fascist in 1937 (unlike other Italian scientists, such as Fermi, who had the opportunity to switch sides).

1923

1923

in Tags

In Los Angeles, California, the letters HOLLYWOODLAND were erected to advertise a development; in 1945, the last four letters were dismantled.

1923

1923

in Tags

Germany pays its war debts by printing money: inflation is enormous and the mark has practically no value.

1923

1923

in Tags

The French and Belgian armies occupy the Ruhr to force Germany to pay its war debts.

1923

1923

in Tags

Elections in Great Britain. For the first time in the country’s history, the Labour Party wins the elections. It will remain in power for only a year, but it nevertheless breaks the traditional alternation between the Liberal and Conservative Parties.

1923

1923

in Tags

Louis De Broglie, that is, the younger De Broglie brother, proposes that particles of matter sometimes behave like waves, with wavelength lambda = h/p; or: not only is light corpuscular and wave-like, matter is too!

1923

1923

in Tags

Arthur Compton measured the corpuscular properties of light quanta predicted by Einstein. In 1937, Davisson and Thomson did the same for the wave properties predicted by de Broglie.

1923

1923

in Tags

Arthur Compton demonstrates that photons, when encountering charged particles, behave like massless particles.

1923

1923

in Tags

Vladimir Kosma Zworykin, who grew up in Russia, France and the USA, patented the iconoscope, the first electronic camera, at Westinghouse Electric Corporation.

1923

1923

in Tags

Greek-American physician George Papanicolau invents the Pap smear for detecting uterine cancer.

1923

1923

in Tags

Hermann Oberth, later a member of the American space program, publishes “The Rocket into Planetary Space” in Germany.

1923

1923

in Tags

In the Soviet Union, the U1, TB1 and other rockets were developed, which would become famous during the Second World War for being launched by the famous Katyushas.

1923

1923

in Tags

Russia. Alexander Friedmann publishes “The World in Space and Time,” in which he hypothesizes possible universes governed by General Relativity, with a Big Bang and a Big Crunch, or expansion to infinity.

1923

1923

in Tags

Hardy and Littlewood showed that, if the Riemann Hypothesis is true, then every large odd number can be expressed as the sum of three primes.

1923

1923

in Tags

Bertrand Russel writes: “…all the noonday brightness of human genius, are destined to extinction in the vast death of the solar system, and the whole temple of Man’s achievements must inevitably be buried beneath the debris of a universe in ruins… (…) only within the scaffolding of these truths, only on the firm foundation of unyelding despair, can the soul’s habitation be safely built”.

1922

1922

in Tags

The Russian physicist Aleksandr Fridman (or Friedmann) demonstrates that with the hypothesis of a universe identical in every direction and that it would be so even if observed from another observation point, on the basis of general relativity the universe cannot be static and must therefore have been born from an explosion of some kind.

1922

1922

in Tags

Philo Taylor Farnsworth, a 15-year-old student at Mormon High School in Rigby, Idaho, invents an electronic television system and proposes it to his chemistry teacher.

November 26, 1922

November 26, 1922

in Tags

Archaeologists enter Tutankhamen’s tomb. British archaeologists Howard Carter and Lord Carnarvon are the first men to enter the tomb of the Egyptian pharaoh Tutankhamen in over 3,000 years. Carter had discovered the entrance to the adolescent pharaoh’s tomb three weeks earlier, hidden among the debris near the excavations of Ramesses VI’s tomb. Tutankhamen’s sealed burial chambers were found miraculously intact, containing a collection of several thousand objects, including a golden sarcophagus containing the boy king’s mummy. Many of these treasures are now housed in the Cairo Museum.

November 14, 1922

November 14, 1922

in Tags

The BBC (British Broadcasting Corporation) is established through the merger of six British companies, including the London-based company WTSC (Wireless Telegraph and Signal Company), founded by Guglielmo Marconi.

1922

1922

in Tags

The U.S. traffic death rate is 24 deaths per 100 million miles traveled. This is a very high rate, which rapidly declines to 10 in 1940 and then gradually to 1 in 2015.

1922

1922

in Tags

Following the example set by American democracy, the number of democracies increased, primarily in Western Europe, reaching 29. It then dropped to 12 in 1942, before increasing again to 36 in 1962, worldwide.

October 31, 1922

October 31, 1922

in Tags

Lenin coldly addressed the delegation of the Communist Party of Italy (PCd’I) visiting Moscow: “In Italy, comrades, there was only one man capable of making a revolution: Benito Mussolini. But you have lost him and have not been able to recover him.”

October 28, 1922

October 28, 1922

in Tags

Rome. On the very day Corbino and Fermi were supposed to meet to discuss young Enrico’s future, the Fascist march on Rome takes place. Corbino is a prominent figure, Minister of Education in 1921, and in 1923 he will also be Minister of National Economy, although he never takes up the Fascist Party membership card. He is a brilliant and savvy technocrat. On October 28th, in his conversation with Enrico, Corbino correctly predicts the fascist dictatorship. He recommends Fermi a scholarship to the University of Göttingen, Germany, which Enrico wins on October 30th.

August 2, 1922

August 2, 1922

in Tags

Alexander Graham Bell dies. Teaching the deaf to speak was his primary goal in life and career. Incidentally, he was also the inventor of the telephone (until the U.S. Congress awarded the invention to Meucci). He also worked for the journal Science, establishing it on solid financial footing, and also directed the Smithsonian Institution for several years. He also won the prestigious Volta Prize, established by Napoleon Bonaparte, for the invention of the telephone. Public schools and associations for the deaf still bear his name.

July 7, 1922

July 7, 1922

in Tags

Enrico Fermi’s dissertation at the Scuola Normale Superiore in Pisa, on X-ray diffraction. At the time, Enrico Fermi was the leading proponent of relativity in the Italian physics community. He graduated with honors.

May 17, 1922

May 17, 1922

in Tags

Soviet Union. Lenin wrote again to the People’s Commissar of Justice: “Comrade Kursky! I hope the fundamental concept is clear […]: openly state the principle that motivates the essence and justification of terror, its necessity, its limits. Justice must not eliminate terror […] only a revolutionary sense of right and revolutionary consciousness can suggest its practical application, more or less extensive. Communist greetings. Lenin.”

May 12, 1922

May 12, 1922

in Tags

Soviet Union. Lenin writes to the People’s Commissar of Justice: “Comrade Kursky! In my opinion, the shooting must be extended to all forms of activity of Mensheviks, etc.; a formulation must be found thatconnect these actions with the international bourgeoisie” (italics and spacing are Lenin’s). He makes an addition in a second letter five days later, clarifying the purpose of the terror and its practical application.

February 1922

February 1922

in Tags

Soviet Central Asia. Enver Pasha, a sort of Pan-Turkish Garibaldi, conquers Dushanbe at the head of only 200 men. He is captured and killed by the Red Army a few weeks later on the Afghan border.

January 23, 1922

January 23, 1922

in Tags

Insulin injection saves diabetic patient. In Toronto, Leonard Thompson becomes the first diabetic to be treated with insulin. Diabetes had been known for over 3,000 years, but its precise cause remained a mystery until the 1920s. At the beginning of the 20th century, the only cure for this lethal disease was a diet low in carbohydrates and sugar but high in fat and protein, which extended the patient’s life by approximately a year. The revolutionary discovery occurred at the University of Toronto in the summer of 1921, where Canadians Frederick Banting and Charles Best extracted insulin from the pancreases of laboratory animals, producing the symptoms of diabetes, and subsequently injected the protein according to a schedule that restored the animals to normal. The experiment confirmed the theory that diabetes was caused by a deficiency of the substance needed to metabolize sugars. Assisted by other scientists, Banting and Best began treating Thompson with insulin extracted from the pancreases of slaughter animals. The boy improved significantly. Since 1923, insulin, now widely available, has continued to save the lives of countless people around the world.

1920s

1920s

in Tags

French veterinarian and biologist Gaston Ramon developed vaccines against diphtheria and tetanus. He helped save 60 million lives (estimate updated at the beginning of the 21st century).

1922

1922

in Tags

Abel Wolman becomes Chief Engineer of the Maryland State Department of Health. Along with Linn Eslow, he invents water chlorination, helping save an estimated 177 million lives (up to the beginning of the 21st century alone).

1922

1922

in Tags

Tutankhamun’s tomb is discovered in the Valley of the Kings, behind the Temple of Hatshepsut, on the western bank of the Nile, opposite Luxor (Thebes)