Showing posts with label 1812. Show all posts
Showing posts with label 1812. Show all posts

12 October 2019

Ascanio Sobrero - chemist

Professor who discovered nitroglycerine


Ascanio Sobrero discovered nitroglycerine during an experiment in his laboratory at Turin University
Ascanio Sobrero discovered nitroglycerine during
an experiment in his laboratory at Turin University
The chemist Ascanio Sobrero, who discovered of the volatile compound that became known as nitroglycerine, was born on this day in 1812 in Casale Monferrato in Piedmont.

Nitroglycerine has a pharmaceutical use as a vasodilator, improving blood flow in the treatment of angina, but it is more widely known as the key ingredient in explosives such as dynamite and gelignite.

Its commercial potential was exploited not by Sobrero but by Alfred Nobel, the Swedish businessman and philanthropist who gave his name to the annually awarded Nobel Prizes.

Sobrero, aware of how much damage it could cause, had actually warned against nitroglycerine being used outside the laboratory.

Little is known about Sobrero’s early life, apart from his being born in Casale Monferrato, a town about 60km (37 miles) east of Turin.

He studied medicine in Turin and Paris and then chemistry at the University of Giessen in Germany, earning his doctorate in 1832. In 1845 he returned to the University of Turin, becoming a professor there.

Alfred Nobel, pictured at around the time he met Sobrero in Paris in 1850
Alfred Nobel, pictured at around the time he met
Sobrero in Paris in 1850
Sobrero had acquired some knowledge of explosives from the French chemist Théophile-Jules Pelouze, who had taught at the University of Turin while he was a student.

Around 1846 or 1847, during research, Sobrero experimented by adding glycerol to a mixture of concentrated nitric and sulfuric acids. The result was a colorless, oily liquid with a sweet, burning taste.

When he tried heating a drop in a test tube, it exploded. The fragments of glass scarred Sobrero’s face and hands. The liquid’s volatility frightened Sobrero so much that he told no one about it for more than a year. After he did finally announce his discovery, which he called pyroglycerine, he wrote to fellow chemists warning against its use, expanding on his misgivings in academic journals.

Nobel, whose family owned an armaments business in St Petersburg, had been, like Sobrero, a student at the University of Turin, albeit somewhat later.  They happened to meet in Paris in 1850.  On learning about Sobrero’s discovery, Nobel became interested in finding a way to control nitroglycerine’s explosive qualities.

It took him many years to achieve that ambition and there were mishaps along the way, not least in 1864, after the family had returned to Sweden from Russia, when an explosion at their factory in Heleneborg, Stockholm, killed five people, including Nobel's younger brother Emil. Undaunted, Nobel continued his work and in 1867 he obtained a patent as the inventor of dynamite. He went on to invent gelignite and ballistite, a predecessor of cordite.

The Nobel family business was still producing dynamite to Alfred's patented formula in the 1930s
The Nobel family business was still producing dynamite
to Alfred's patented formula in the 1930s
The inventions made Nobel’s fortune. He unfailingly acknowledged Sobrero as the man who had discovered nitroglycerine, although Sobrero sometimes claimed he was not given sufficient recognition.

At other times, by contrast, he gave the impression he would rather Nobel did not mention his name at all.  He was on record as saying: “When I think of all the victims killed during nitroglycerine explosions, and the terrible havoc that has been wreaked, which in all probability will continue to occur in the future, I am almost ashamed to admit to be its discoverer.”

Sobrero died in Turin in 1888, at the age of 75.  He is buried at the cemetery of Cavallermaggiore, about 40km (25 miles) south of Turin.

Piazza Mazzini in Casale Monferrato, which is named after the revolutionary hero Giuseppe Mazzini
Piazza Mazzini in Casale Monferrato, which is named
after the revolutionary hero Giuseppe Mazzini
Travel tip:

Situated on the south bank of the Po river, Casale Monferrato is a town of some 36,000 inhabitants based on a former Roman city, later turned into a major citadel by the Gonzaga family. The historic centre is itself centred on Piazza Mazzini, the site of the Roman forum. The square is dominated by an 1843 equestrian statue by Abbondio Sangiorgio of King Charles Albert of Piedmont-Sardinia.  To the east of the square is the Lombard Romanesque cathedral of Sant'Evasio, founded in 742 and rebuilt in the early 12th century, occupying the site of a Roman temple dedicated to Jupiter.  See also the castle on Piazza Castello, a fortress that probably dates from 1000, built to a quadrilateral plan with corner towers and a moat.

An internal quadrangle at the University of Turin, where Sobrero was a student and later a professor
An internal quadrangle at the University of Turin, where
Sobrero was a student and later a professor
Travel tip:

The University of Turin, where Sobrero studied and taught, is one of the oldest universities in Europe, founded in 1406 by Prince Ludovico di Savoia. It consistently ranks among the top five universities in Italy and is an important centre for research. The university departments are spread around 13 facilities, with the main university buildings in Via Giuseppe Verdi, close to Turin’s famous Mole Antonelliana.

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14 November 2017

Maria Cristina of Savoy

Pious princess was beatified by Pope Francis


Maria Cristina of Savoy
Maria Cristina of Savoy
Princess Maria Cristina Carlotta Giuseppina Gaetana Elisa of Savoy was born on this day in 1812 in Cagliari on the island of Sardinia.

She was the youngest child of King Victor Emmanuel I of Piedmont-Sardinia and his wife Queen Maria Teresa of Austria-Este.

Maria Cristina was described as beautiful, but she was also modest and pious and in 2014 she was beatified by the current Pope, Francis.

As a Savoy princess she had been expected to make an advantageous marriage alliance and when she was just 20 years of age she was married to Ferdinand II of the Two Sicilies, in an attempt to keep southern Italy on friendly terms, at a ceremony in Genoa.

Modest and reserved, she was never comfortable at the royal court in Naples and she was unhappy with Ferdinand. But she was said to be loved by the ordinary people of the Two Sicilies, who were charmed by her beauty and kindness.

Maria Cristina died only five days after giving birth to her son, Francis
Maria Cristina died only five days after giving
birth to her son, Francis
She had always been a devout Catholic and her commitment to God and the Church along with her beauty caused people to regard her as an angelic figure.

She gave birth to her only child, who would grow up to become Francis II of the Two Sicilies, in January 1836. Five days later she died as a result of childbirth complications. The King married again in less than a year.

After her son, Francis II, had lost his throne and was living in exile he began to push for the Church to take up his late mother’s cause for beatification.

Nearly 40 years later in 1872 she was declared to be a Servant of God by Pope Pius IX. In May 1937 she was declared to be a Venerable Servant of God by Pope Pius XI and in May 2013 Pope Francis authorised a decree recognising a miracle due to her intercession, a further stage on her progress to beatification. The beatification ceremony was conducted by the current Pope in January 2014 at the Basilica of Santa Chiara in Naples, where the now Blessed Maria Cristina is buried.

The Castello is the historic centre of Cagliari
The Castello is the historic centre of Cagliari
Travel tip:

Maria Cristina was born in Cagliari in Sardinia while the Savoy family were living there in exile, having been forced to leave their palace in Turin in Piedmont because the city was under French occupation. Although Cagliari is Sardinia’s main port and an industrial centre it is now also a popular tourist destination, with tree-lined boulevards and a charming historic centre, known as Castello.

The tomb of Maria Cristina of Savoy in the Basilica of Santa Chiara in Naples
The tomb of Maria Cristina of Savoy in the Basilica
of Santa Chiara in Naples
Travel tip:

Maria Cristina was buried in the Church of Santa Chiara in Via Benedetto Croce, part of Spaccanapoli in Naples. The church is part of a religious complex, which also includes a monastery and an archaeological museum. Maria Cristina’s tomb is in a side chapel along with the tomb of Salvo d’Acquisto, a carabiniere who sacrificed his life to save the lives of 22 civilian hostages during the Nazi occupation of Italy. Outside is the famous majolica Cloister, which was decorated in 1742 with brightly-coloured majolica tiles by Domenico Antonio Vaccaro.


14 November 2015

Aleardo Aleardi - poet and patriot


History-loving writer dreamed of a united Italy


Aleardo Aleardi became an important figure in the Risorgimento movement
Aleardo Aleardi became an important
figure in the Risorgimento movement
Patriotic poet Aleardo Aleardi was born on this day in 1812 in Verona.  

At the height of his success he was hailed as an important figure in the Risorgimento movement and there is now a school named after him in the city of his birth.

Aleardi’s poems are mostly about events in Italian history and his love for his home country, which was under Austrian occupation while he was growing up.

He was originally named Gaetano Maria but changed his name to Aleardi, the surname of his father, Count Giorgio Aleardi, when he started writing.

Aleardi studied law at Padova University but gradually became more interested in poetry, influenced by some of his fellow students who were involved in the romantic Risorgimento movement.

Risorgimento, which means resurgence, was the name for the political and social movement that led to the consolidation of the different states of the Italian peninsula into the single state of the Kingdom of Italy during the 19th century. Most historians agree that the process began in 1815 with the end of Napoleonic rule in Italy and was completed in 1871 when Rome became the capital of the new united Italy and King Victor Emmanuel took up residence in the Palazzo Quirinale.

Aleardi’s first success came with Le Lettere a Maria (Letters to Mary), in which he expressed his belief in the immortality of the soul. He reached the height of his success with I Canti, a collection of poems published in 1864, which was reprinted eleven times.

Aleardi was sent to Paris in 1848 by Daniele Manin, a hero of the Risorgimento movement, to try to gather support for freeing Venice from the Austrians.

He was arrested and imprisoned by the Austrians twice, but survived the ordeals to become a member of parliament after Italian unification.

He became a senator in 1873 and then a professor of aesthetics in Florence, where he died in 1878.

The University of Padova, where Aleardi studied law
before devoting his time increasingly to poetry
Travel Tip:

The University of Padova, where Aleardi studied law, was established in 1222 and is one of the oldest in the world, second in Italy only to the University of Bologna. The main university building, Palazzo del Bo in Via 8 Febbraio in the centre of Padova, used to house the medical faculty. You can take a guided tour to see the pulpit used by Galileo when he taught at the university between 1592 and 1610.

The romantic so-called 'Juliet balcony' became an attraction for visitors to visitors to Verona
The romantic so-called 'Juliet balcony' became an attraction
for visitors to visitors to Verona
Travel tip:

Verona, where Aleardi was born, is the second biggest city in the Veneto. It is home to the first-century Roman Arena, famous for staging open air opera productions, and Casa di Giulietta, which has a romantic marble ‘Juliet’ balcony, although there is little evidence that the real-life Romeo ever stood below it declaring his love for Juliet.


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