what kind of experiments did humphrey davy do?
He experimented with the voltaic pile decided that it was a chemical action which caused the production of electricity in electrolytic cells, and that the chemical interaction occurred between substances which had an opposite charge.
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 In March 1801 , Frederick Accum was offered a position at the Royal Institution in Ablemarle Street , a research institute founded two years earlier by Count Rumford . Accepting the position , he began as laboratory assistant to Humphry Davy , who had been hired at the same time as director of the laboratory , and would later become the president of the Royal Society . Accum ’ s employment at the Royal came to an end in September 1803 . His biographer , R. J. Cole , speculates this change was connected with the simultaneous departure of Count Rumford for employment in Paris . Rumford had been the driving force behind securing a position for Accum . 

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 Chadwick dropped all his other responsibilities to concentrate on proving the existence of the neutron , frequently working late at night . He devised a simple apparatus that consisted of a cylinder containing a polonium source and beryllium target . The resulting radiation could then be directed at a material such as paraffin wax ; the displaced particles , which were protons , would go into a small ionisation chamber where they could be detected with an oscilloscope . 

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 The experiments continued in 1942 , but were ultimately unsuccessful ; the problems posed by impurities in the coke and uranium oxide had not been fully appreciated , and as a result too many neutrons were captured . But Laurence 's efforts attracted some attention , and in the summer of 1940 he was visited by R. H. Fowler , the British scientific liaison officer in Canada . This was followed by a visit from John Cockcroft of the British Tizard Mission to the United States in the autumn . They brought news of the similar research being carried out under the supervision of the Maud Committee in Britain and the National Defense Research Committee ( NDRC ) in the United States . 

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 The Quatermass Experiment is a British science @-@ fiction serial broadcast by BBC Television during the summer of 1953 and re @-@ staged by BBC Four in 2005 . Set in the near future against the background of a British space programme , it tells the story of the first manned flight into space , supervised by Professor Bernard Quatermass of the British Experimental Rocket Group . When the spaceship that carried the first successful crew returns to Earth , two of the three astronauts are missing , and the third is behaving strangely . It becomes apparent that an alien presence entered the ship during its flight , and Quatermass and his associates must prevent the alien from destroying the world . 

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 Oliphant left the Cavendish Laboratory in 1937 to become the Poynting Professor of Physics at the University of Birmingham . He attempted to build a 60 @-@ inch ( 150 cm ) cyclotron at the university , but its completion was postponed by the outbreak of the Second World War in Europe in 1939 . He became involved with the development of radar , heading a group at the University of Birmingham that included John Randall and Harry Boot . They created a radical new design , the cavity magnetron , that made microwave radar possible . Oliphant also formed part of the MAUD Committee , which reported in July 1941 , that an atomic bomb was not only feasible , but might be produced as early as 1943 . Oliphant was instrumental in spreading the word of this finding in the United States , thereby starting what became the Manhattan Project . Later in the war , he worked on it with his friend Ernest Lawrence at the Radiation Laboratory in Berkeley , California , developing electromagnetic isotope separation . 
