|Died||21 December 1809 60) (aged|
Tiberius Cavallo (also Tiberio) (30 March 1749, Naples, Italy – 21 December 1809, London, England) was an Italian physicist and natural philosopher.His interests included electricity, the development of scientific instruments, the nature of "airs", and ballooning. He became both a Member of the Royal Academy of Sciences in Naples, and a Fellow of the Royal Society of London in 1779. Between 1780 and 1792, he presented the Royal Society's Bakerian Lecture thirteen timees in succession.
Tiberius Cavallo was born on 30 March 1749 at Naples, Italywhere his father was a physician. In 1771 he moved to England.
He made several ingenious improvements in scientific instruments. Cavallo is often cited as the inventor of Cavallo's multiplier.He also developed a "pocket electrometer" that he used to amplify small electric charges to make them observable and measurable with an electroscope. Parts of the instrument were protected from drafts by a glass enclosure.
He also worked on refrigeration.Following the work of William Cullen in 1750 and Joseph Black in 1764, Cavallo was the first to carry out systematic experiments on refrigeration using the evaporation of volatile liquids, in 1781.
He was interested in the physical properties of "airs" or gases, and carried out experiments on "inflammable air" (hydrogen gas).In his Treatise on the Nature and Properties of Air (1781) he makes “a judicious examination of contemporary work", discussing both the phlogiston theory of Joseph Priestley and the contrasting views of Antoine Lavoisier. In June 1782, a paper of Cavallo's was read at the Royal Society, describing the first attempt to lift a hydrogen-filled balloon into the air. His History and Practice of Aerostation (1785) is considered "one of the earliest and best works on aerostation published in eighteenth century England". In it, Cavallo discusses both recent experiments in ballooning, and its underlying principles. Cavallo targeted a more general audience in this work, avoiding technical jargon and mathematical proofs, and was an effective science communicator to both his peers and the general public. His work influenced pioneer balloonists Jacques Charles, the Robert brothers, and Jean-Pierre Blanchard.
Cavallo also published on musical temperament in his treatise Of the Temperament of Those Musical Instruments, in Which the Tones, Keys, or Frets, are Fixed, as in the Harpsichord, Organ, Guitar, &c.
He died in London on 21 December 1809.He was buried in Old St Pancras Churchyard reportedly in a vault near that of Pasquale Paoli. The grave is lost but he is listed on the Burdett Coutts memorial of 1879 to the many important persons buried therein.
He published numerous works on different branches of physics, including:
For Rees's Cyclopædia he contributed articles on Electricity, Machinery and Mechanics, but the topics are not known.
Alessandro Giuseppe Antonio Anastasio Volta was an Italian physicist, chemist, and pioneer of electricity and power who is credited as the inventor of the electric battery and the discoverer of methane. He invented the Voltaic pile in 1799, and reported the results of his experiments in 1800 in a two-part letter to the President of the Royal Society. With this invention Volta proved that electricity could be generated chemically and debunked the prevalent theory that electricity was generated solely by living beings. Volta's invention sparked a great amount of scientific excitement and led others to conduct similar experiments which eventually led to the development of the field of electrochemistry.
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Henry Cavendish FRS was an English natural philosopher, scientist, and an important experimental and theoretical chemist and physicist. He is noted for his discovery of hydrogen, which he termed "inflammable air". He described the density of inflammable air, which formed water on combustion, in a 1766 paper, On Factitious Airs. Antoine Lavoisier later reproduced Cavendish's experiment and gave the element its name.
Jacques Alexandre César Charles was a French inventor, scientist, mathematician, and balloonist. Charles wrote almost nothing about mathematics, and most of what has been credited to him was due to mistaking him with another Jacques Charles, also a member of the Paris Academy of Sciences, entering on May 12, 1785. He was sometimes called Charles the Geometer. Charles and the Robert brothers launched the world's first unmanned hydrogen-filled gas balloon in August 1783; then in December 1783, Charles and his co-pilot Nicolas-Louis Robert ascended to a height of about 1,800 feet in a manned gas balloon. Their pioneering use of hydrogen for lift led to this type of balloon being named a Charlière.
The year 1783 in science and technology involved some significant events:
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