What did mathematician John Napier invent in 1614?
What did mathematician John Napier invent in 1614? Logarithms
1614
July 23 – History, Events, Births, Deaths Holidays and Observances On This Day
July 23 in History 811 – Byzantine emperor Nikephoros I plunders the Bulgarian capital of Pliska and captures Khan Krum’s treasury. 1319 – A Knights Hospitaller fleet scores a crushing victory over an Aydinid fleet off Chios. 1632 – Three hundred colonists bound for New France depart from Dieppe, France. 1677 – Scanian War: Denmark–Norway captures the harbor town of Marstrand from Sweden. 1793 – Kingdom of Prussia re-conquers Mainz from France. 1813 – Sir Thomas…
July 15 – History, Events, Births, Deaths, Holidays and Observances On This Day
July 15 in History 484 BC – Dedication of the Temple of Castor and Pollux in ancient Rome AD 70 – Titus and his armies breach the walls of Jerusalem. (17th of Tammuz in the Hebrew calendar). 756 – An Lushan Rebellion: Emperor Xuanzong of Tang is ordered by his Imperial Guards to execute chancellor Yang…
July 14 – History, Events, Births, Deaths, Holidays and Observances On This Day
July 14 in History 756 – An Lushan Rebellion: Emperor Xuanzong flees the capital Chang’an as An Lushan’s forces advance toward the city. 1223 – Louis VIII becomes King of France upon the death of his father, Philip II. 1420 – Battle of Vítkov Hill, decisive victory of Czech Hussite forces commanded by Jan…
July 10 – History, Events, Births, Deaths, Holidays and Observances On This Day
July 10 in History 138 – Emperor Hadrian dies of heart failure at Baiae; he is buried at Rome in the Tomb of Hadrian beside his late wife, Vibia Sabina. 645 – Isshi Incident: Prince Naka-no-Ōe and Fujiwara no Kamatari assassinate Soga no Iruka during a coup d’état at the imperial palace. 988 – The Norse King Glúniairn recognises Máel Sechnaill mac Domnaill, High…
July 6 – History, Events, Births, Deaths, Holidays and Observances On This Day
July 6 in History 371 BC – The Battle of Leuctra shatters Sparta’s reputation of military invincibility. 640 – Battle of Heliopolis: The Muslim Arab army under ‘Amr ibn al-‘As defeat the Byzantine forces near Heliopolis (Egypt). 1253 – Mindaugas is crowned King of Lithuania. 1348 – Pope Clement VI issues a papal bull protecting the Jews accused of having caused the Black…
July 2 – History, Events, Births, Deaths, Holidays and Observances On This Day
This day is the midpoint of a common year because there are 182 days before and 182 days after it in common years, and 183 before and 182 after in leap years. The exact time of the middle of the…
July 1 – History, Events, Births, Deaths, Holidays and Observances On This Day
It is the last day of the first half of the year. The end of this day marks the halfway point of a leap year. It also falls on the same day of the week as New Year’s Day in a leap year.…
June 24 – History, Events, Births, Deaths, Holidays and Observances On This Day
June 24 in History 1312 BC – Mursili II launches a campaign against the Kingdom of Azzi-Hayasa. 217 BC – The Romans, led by Gaius Flaminius, are ambushed and defeated by Hannibal at the Battle of Lake Trasimene. 109 – Roman emperor Trajan inaugurates the Aqua Traiana, an aqueduct that channels water from Lake Bracciano, 40 kilometres…
June 15 – History, Events, Births, Deaths, Holidays and Observances On This Day
June 15 in History 763 BC – Assyrians record a solar eclipse that is later used to fix the chronology of Mesopotamian history. 844 – Louis II is crowned as king of Italy at Rome by pope Sergius II. 923 – Battle of Soissons: King Robert I of France is killed and King Charles the Simple is arrested by the supporters of…