Answer the question at the end by quoting:

James Watt  (30 January 1736 (19 January 1736 OS) - 25 August 1819) was a Scottish inventor, mechanical engineer, and chemist who improved on Thomas Newcomen's 1712 Newcomen steam engine with his Watt steam engine in 1781, which was fundamental to the changes brought by the Industrial Revolution in both his native Great Britain and the rest of the world. While working as an instrument maker at the University of Glasgow, Watt became interested in the technology of steam engines. He realised that contemporary engine designs wasted a great deal of energy by repeatedly cooling and reheating the cylinder. Watt introduced a design enhancement, the separate condenser, which avoided this waste of energy and radically improved the power, efficiency, and cost-effectiveness of steam engines.
From an early age Watt was very interested in chemistry. In late 1786, while in Paris, he witnessed an experiment by Berthollet in which he reacted hydrochloric acid with manganese dioxide to produce chlorine. He had already found that an aqueous solution of chlorine could bleach textiles, and had published his findings, which aroused great interest among many potential rivals. When Watt returned to Britain, he began experiments along these lines with hopes of finding a commercially viable process. He discovered that a mixture of salt, manganese dioxide and sulphuric acid could produce chlorine, which Watt believed might be a cheaper method. He passed the chlorine into a weak solution of alkali, and obtained a turbid solution that appeared to have good bleaching properties. He soon communicated these results to James McGrigor, his father-in-law, who was a bleacher in Glasgow. Otherwise he tried to keep his method a secret.  With McGrigor and his wife Annie, he started to scale up the process, and in March 1788, McGrigor was able to bleach 1500 yards of cloth to his satisfaction. About this time Berthollet discovered the salt and sulphuric acid process, and published it so it became public knowledge. Many others began to experiment with improving the process, which still had many shortcomings, not the least of which was the problem of transporting the liquid product. Watt's rivals soon overtook him in developing the process, and he dropped out of the race. It was not until 1799, when Charles Tennant patented a process for producing solid bleaching powder (calcium hypochlorite) that it became a commercial success.  By 1794 Watt had been chosen by Thomas Beddoes to manufacture apparatus to produce, clean and store gases for use in the new Pneumatic Institution at Hotwells in Bristol. Watt continued to experiment with various gases for several years, but by 1797 the medical uses for the "factitious airs" had come to a dead end.

What chemical expirements did James Watt study

Watt was very interested in chemistry. In late 1786, while in Paris, he witnessed an experiment by Berthollet in which he reacted hydrochloric acid with manganese dioxide



Answer the question at the end by quoting:

Susan Magdalane Boyle (born 1 April 1961) is a Scottish singer who came to international attention when she appeared as a contestant on the TV programme Britain's Got Talent on 11 April 2009, singing "I Dreamed a Dream" from Les Miserables. Her first album, I Dreamed a Dream, was released in November 2009 and became the UK's best-selling debut album of all time, beating the previous record held by Spirit by Leona Lewis. I Dreamed a Dream set a record for biggest first week sales by a debut album, according to the Official Chart Company in the United Kingdom.
In August 2008, Boyle applied for an audition for the third series of Britain's Got Talent (as contestant number 43212) and was accepted after a preliminary audition in Glasgow. When Boyle first appeared on Britain's Got Talent at the city's Clyde Auditorium, she said that she aspired to become a professional singer "as successful as Elaine Paige". Boyle sang "I Dreamed a Dream" from Les Miserables in the first round, which was watched by over 10 million viewers when it aired on 11 April 2009. Programme judge Amanda Holden remarked upon the audience's initially cynical attitude, and the subsequent "biggest wake-up call ever" upon hearing her performance.  Boyle was "absolutely gobsmacked" by the strength of the reaction to her appearance. Afterwards, Paige expressed interest in singing a duet with Boyle, and called her "a role model for everyone who has a dream". Boyle's rendition of "I Dreamed a Dream" was credited with causing a surge in ticket sales in the Vancouver production of Les Miserables. Cameron Mackintosh, the producer of the musical, also praised the performance, as "heart-touching, thrilling and uplifting".  Boyle was one of 40 acts that were put through to the semi-finals. She appeared last on the first semi-final on 24 May 2009, performing "Memory" from the musical Cats. In the public vote, she was the act to receive the highest number of votes to go through to the final. She was the clear favourite to win the final, but ended up in second place to dance troupe Diversity; the UK TV audience was a record of 17.3 million viewers.  The Press Complaints Commission (PCC) became concerned by press reports about Boyle's erratic behaviour and speculation about her mental condition and wrote to remind editors about clause 3 (privacy) of their code of press conduct. The day after the final, Boyle was admitted to The Priory, a private psychiatric clinic in London, Talkback Thames explained, "Following Saturday night's show, Susan is exhausted and emotionally drained." Her stay in hospital attracted widespread attention, with Prime Minister Gordon Brown wishing her well. Cowell offered to waive Boyle's contractual obligation to take part in the BGT tour. Her family said "she's been battered non-stop for the last seven weeks and it has taken its toll [...but...] her dream is very much alive," as she had been invited to the Independence Day celebrations at the White House.  Boyle left the clinic three days after her admission and said she would participate in the BGT tour. Despite health concerns, she appeared in 20 of the 24 dates of the tour, and was well received in cities including Aberdeen, Edinburgh, Dublin, Sheffield, Coventry, and Birmingham. The Belfast Telegraph stated that "Despite reports of crumbling under the pressure..., she exuded a confidence resembling that of a veteran who has been performing for years".

how did it take its toll?
Boyle left the clinic three days after her admission and said she would participate in the BGT tour. Despite health concerns,