Piano Concerto No.2 in C minor Opus 18 (2) Sergei Rachmaninov
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Music's greatest inventions: amazing, mad and brilliant instruments
As well as being behind some of the most beloved English music of all time, Sir Edward Elgar was also a keen amateur chemist. He would happily spend hours in his shed tinkering away at little experiments, but the culmination was most certainly his invention of the Elgar Sulphuretted Hydrogen Apparatus, which was a device for synthesising hydrogen sulphide that briefly went into production.