Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Ludwig August Colding (13 July 1815 21 March 1888) was a Danish civil engineer and physicist who articulated the principle of conservation of energy contemporaneouly with, and independently of, James Prescott Joule and Julius Robert von Mayer though his contribution was largely overlooked and neglected. Born in Holbæk, Denmark, his father, Andreas Christian, had been an officer in the Danish privateer service. Ludwig's mother, Anna Sophie, was the daughter of a clergyman and imbued the household with a deeply religious sentiment. Around the time of Ludwig's birth, his father retired from seafaring and took up a position as a farm manager.