Johann Halcke

Johann Halcke ( also: Johannes Halcke ), called "der Harrende" (* around 1665; † September 15, 1735 in Uetersen ) was a German author , mathematician , typist and arithmetic master .

He was the brother of Paul Halcke (Halcken), also a typist and mathematician, and had been a member of the Hamburgische Kunst -rechnung- loving and practicing society since 1690, now the Mathematical Society in Hamburg . Around 1700 Halcke was appointed scribe and arithmetic master for Denmark, Norway and Holstein under King Friedrich IV. At the same time he was a Danish calendar writer in the duchies and from 1700 to 1736 the author of the Schleswig-Holstein calendar. In 1734 Halcke wrote the first Royal Danish Court and State Calendar, a state manual for the Danish monarchy. He also wrote several textbooks that made him known beyond the country's borders.

Works (selection)

• Deliciæ Mathematicæ, or Mathematisches Sinnen-Confect /: Consists of five hundred four and seventy selected / in part even artful algebra, geometrical and astronomical tasks / adorned with many artificial solutions and rules / specialty of a curious invention of the logarithmorum, from the Qvadratura Circuli. .. and other meaningful things more; In addition to a preparation / including the algebraic fundamentals, as well as the most fundamentally correct rules of the Qvadrat-Cubic and Zens-Zensi-Coss are shown (Wolgemuht, 1719) - 382 pages.
• Improved Royal Schleßwig-Hollsteinischer Cantzeley and Contoir writing calendar, published on the 1708th year of Christ, Abermahl (Reymers, 1708).

swell

• Niels Nikolaus Falck : New citizenship magazine, with special consideration for the duchies of Schleswig, Holstein and Lauenburg. Schleswig 1834 [1]
• Johann August Grunert : Archive of Mathematics and Physics. Volumes 13-14, page 132 (1849) [2]