Senin, 28 Februari 2011

On this day in history: Radioactivity discovered, 1896

Born in Paris in December 1852, Henri Becquerel followed the family trade and became a scientist. His father, Alexandre-Edmond Becquerel, and his grandfather, Antoine César Becquerel, discovered the photovoltaic effect and both contributed to scientific knowledge about luminescence and phosphorescence. Both Alexandre-Edmond and Antoine César occupied the chair of applied physics at the Muséum National d'Histoire Naturelle, and in 1892 Henri followed suit.

In 1896, Henri Becquerel decided to investigate the x-rays that Wilhelm Röntgen had discovered at the end of the previous year. He deduced an experiment to test his theory that phosphorescent materials absorbed sunlight and then emitted it in the form of x-rays. He wrapped photographic plates in heavy cardboard to prevent their exposure to sunlight. Onto these plates he placed some fluorescent potassium uranyl sulfate crystals with coins and cut metal shapes between the crystals and the wrapped plates.

He left the experiment out in the sunshine and when he developed the plates he saw the outlines of the coins and metal shapes. Thinking that the experiment had proven his theory he presented his initial findings at the Académie des sciences. Nevertheless, he wanted to confirm his theory with further experimentation but several days of overcast conditions in Paris resulted in him leaving the experimental materials in a drawer.

On 1st March 1896 he decided to develop the photographic plates anyway, expecting to see only faint images. To his surprise he saw very clear images of the metal shapes. During a meeting of the Académie held the next day he explained that the uranium salts emitted a radiation without the influence of sunlight.

In further experiments with other non-phosphorescent uranium salts he found the same results and concluded that the element uranium emitted a new form of radiation. His discovery inspired the husband and wife team of Pierre and Marie Curie to conduct further research into radioactivity. In 1903 the Curies and Becquerel jointly received the Nobel Prize in Physics.

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Minggu, 27 Februari 2011

On this day in history: Last episode of M*A*S*H broadcast, 1983

In 1968, Richard Hooker (r.n. H. Richard Hornberger) published a novel called MASH: A Novel About Three Army Doctors. He based the book, which he wrote in collaboration with the sports writer W.C. Heinz, on his experiences as a surgeon at the 8055th Mobile Army Surgical Hospital during the Korean War, basing the character of Hawkeye Pierce on himself. Two years later 20th Century Fox released a movie adaptation of the book directed Robert Altman and starring Elliot Gould as "Trapper John" and Donald Sutherland as "Hawkeye".

The success of the feature film prompted 20th Century Fox to produce a television series. The first episode of M*A*S*H appeared on the CBS network on 17th September 1972. The ensemble cast included only one of the actors from the movie version, Gary Burghoff as "Radar." Alan Alda took the role of "Hawkeye"; Wayne Rogers appeared as "Trapper" (for the first three seasons); Loretta Swit played "Hot Lips" Houlihan; Larry Linville portrayed "Frank" Burns, who was often the butt of the other surgeons joke.

While not an instant hit, the show's popularity grew over time and eleven series were produced. On 28th February 1983, the 251st and final episode of M*A*S*H aired, telling the story of the end of the Korean War and the effect this had on the show's characters. Nearly 106 million Americans watched the two-and-a-half hour special entitled "Goodbye, Farewell and Amen", which remains the most viewed episode of the television series in the United States to this day.

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Sabtu, 26 Februari 2011

On this day in history: Napoleon escaped from Elba, 1815

On 15th August 1769, Napoleon Bonaparte was born in the town of Ajaccio, on Corsica, a year after the island became a French territory. The wealth and political influence of his family enabled him to be schooled in mainland France. Initially he attended a religious school in Autun, then the military academy at Brienne-le-Château and finally the prestigious École Militaire in Paris where he trained to be a artillery officer.

In September 1785, Bonaparte became a second lieutenant in La Fère artillery regiment. During the early stages of the French Revolution, he returned to Corsica on an extended leave of absence, where he commanded a volunteer battalion in support of the radical revolutionaries. In 1793 Bonaparte published a pamphlet in favour of the republican cause which secured for him the support of Augustin Robespierre, the younger brother of the Revolutionary leader.

This patronage resulted in him being given the command of the artillery during the siege of Toulon, which British troops occupied. In recognition of Bonaparte's role in the successful assault on the city, the Republican authorities promoted him to Brigadier-General and gave him command of the artillery in the French army on the Italian border. Nevertheless, he spent a short time in prison in August 1794 following the fall of Robespierre due to his relationship with his brother.

After being released, Napoleon returned to military service but remained out of favour, losing his position as a general. Fortune smiled on Bonaparte again in 1795 when he took command of the forces defending the Republican government during a royalist uprising. In gratitude the new government, called the Directory, promoted him to Commander of the Interior and gave him command of the Army of Italy.

Successful campaigning in Italy brought Napoleon both fame and political influence. He then undertook a colonial expedition to seize Egypt and disrupt British access to India. The campaign proved to be a failure and Napoleon left an army ravaged by disease to return to France, where in 1799 he took part in a coup and became one of a number of provisional Consuls that ruled France.

Napoleon outmanoeuvred his fellow consuls and secured his election as First Consul for Life, effective becoming dictator. During a period of peace following the Treaty of Amiens, Bonaparte set about reforming the administration of France and repairing the infrastructure. During this period both Jacobins and Royalists plotted his overthrow, which gave him the excuse to revive the hereditary monarchy with himself as Emperor of the French. Bonaparte also placed his family and friends on the thrones of European states conquered by the French during the Revolutionary Words, including having himself crowned as King of Italy.

In 1805 the British persuaded the Austrians and Russia to join a coalition against the French. Napoleon gathered an army at Boulogne to invade Britain, but after failing to achieve naval dominance in the Channel he sent this Grande Armée to march into Germany. While the British dominated the seas, Bonaparte's army enjoyed a string of successes across Europe forcing the Austrians to sign a peace treaty. The British then formed a new coalition including Prussia but the dominance of Bonaparte's armies again resulted in the defeat of the continental powers, which he forced to join his Continental System to boycott British goods in a form of economic warfare. When Portuguese would not join the boycott Napoleon sent an army to invade Portugal with the support of the Spanish in 1807.

The Peninsular War marked the turning point in his fortunes as the English and Portuguese armies commanded by Arthur Wellesley, later the Duke of Wellington, drove the French back. In 1809, Austria broke its alliance with France opening a second front and further weakening the French. When the Russians failed to comply with the Continental System, Napoleon led the Grande Armée to invade Russia.

The disastrous campaign and humiliating retreat undermined Napoleon's rule. Following a series of further defeats and the capture of Paris by the Coalition, the Marshals of the French army confronted Bonaparte and forced him to abdicate. While peace negotiations took place between the French and the Coalition countries, Napoleon travelled into exile on the Mediterranean island of Elba. Napoleon retained the title of Emperor but his empire only comprised the island and its twelve-thousand inhabitants. After a failed suicide attempt Napoleon took charge of Elba creating a small military force and modernising the island.

After hearing that the Coalition were about to send him into exile on a remote Atlantic island, on 26th February 1815 Napoleon escaped captivity on Elba with around six-hundred men, arriving in France two days later. The 5th Infantry Regiment intercepted him at Grenoble, but rather than taking him into custody they acclaimed his as their Emperor. The return of Napoleon was similarly welcomed across much of France and he soon wrested the reigns of power away from the restored Bourbon monarchy.

With the loyalty of the senior army officers re-established, Napoleon marched in triumph into Paris on 19th March. After another series of constitutional reforms and mobilisation of the armed forces, he again took France to war against a new Coalition in a pre-emptive strike. His defeat at the Battle of Waterloo and his consequent surrender finally ended his reign. This time he was exiled on a remote island in the South Atlantic called Saint Helena, where he died in May 1821.

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