From what I understand, the word midnight is usually interpreted incorrectly. Midnight is written as 12am which would imply that it's in the morning. Therefore, it should be at the start of the day. On the other hand, both Dictionary.com and the Oxford Dictionary define it as twelve o'clock at night.
James Prescott Joule. The English physicist James Prescott Joule (1818-1889) proved that mechanical and thermal energies are interconvertible on a fixed basis, and thus he established the great principle of conservation of energy.
Jouleâs ancestors were Derbyshire yeomen; his grandfather had become wealthy as the founder of a brewery at Salford. James was the second of five children of Benjamin and Alice Prescott Joule. Together with his elder brother, James received his first education at home. From 1834 to 1837 the two brothers were privately taught elementary mathematics, natural philosophy, and some chemistry by John Dalton, then about seventy years old.