Search Results: John Harrison

The H5 marine chronometer, designed and built by the English clockmaker John Harrison (1693-1776). This was the last in the series of chronometers Harrison made for mariners to better measure longitude and so define their position at sea...

King John of England (aka John Lackland) ruled from 1199 to 1216 CE and he has gone down in history as one of the very worst of English kings, both for his character and his failures. He lost the Angevin-Plantagenet lands in France and so...

The workings of the H5 marine chronometer designed and built by the English clockmaker John Harrison (1693-1776). This was the last in the series of chronometers Harrison made for mariners to better measure longitude. Silver with a white...

A view of the interior workings of the H5 marine chronometer designed and built by the English clockmaker John Harrison (1693-1776). This was the last in the series of chronometers Harrison made for mariners to better measure longitude. Silver...

John Harrison’s first marine timepiece, called H1 and created between 1730 and 1735, was designed to allow navigators to keep Greenwich time and so accurately calculate their longitude position. (National Maritime Museum, Greenwich)

John Quincy Adams (1767-1848) was an American statesman and diplomat who served as the sixth president of the United States (1825-1829). The son of a former president, Adams had a long and distinguished political career both before and after...

John Balliol ruled as the king of Scotland from 1292 to 1296 CE. He was supported by Edward I of England (r. 1272-1307 CE) in the competition to find the successor to the heirless Alexander III of Scotland (r. 1249-1286 CE), a process known...

Portrait of William Henry Harrison (future ninth president of the United States) as a major general in the War of 1812. Oil on canvas by Rembrandt Peale, c. 1813. National Portrait Gallery, Washington, D.C.

John II Komnenos “the Handsome” was emperor of the Byzantine Empire from 1118 CE to 1143 CE. John, almost constantly on campaign throughout his reign, would continue the military successes of his father Alexios I with significant victories...

John Hancock (1737-1793) was a merchant, politician, and Founding Father of the United States, who helped lead the Patriot movement during the American Revolution (1765-1789). He served as president of the Second Continental Congress from...