Nicolaus Rohlfs

Floor plan of the town of Buxtehude by Nicolaus Rohlfs ( 1747 )

Nicolaus Rohlfs (born March 10, 1695 in Hamburg ; † September 29, 1750 in Buxtehude ) was a German mathematician, astronomer, surveyor and calendar maker . From 1722 he was typist and arithmetic master in Hohenfelde , from 1729 Arithmeticus at the city school in Glückstadt and from 1731 typist and arithmetic master in Buxtehude as successor to Paul Halcke . With the nickname "Der Ringende" he was a member of the "Art-Invoice Loving and Practicing Society", today's Mathematical Society in Hamburg. Rohlfs was an astronomical calendar , and later a "Royal Schleswig-Holstein House and Garden - Almanac " and various other papers out, which were continued by his son Matthias Rohlfs.

Fonts

• Trigonometric calculation, the Anno Christi 1724. the 22nd Maji ... occurring great solar eclipse: how it will present itself over the Hamburg horizon ... set up by Nicolaus Rohlfs. Printing: Struckische Buchdruckerei, Lübeck, approx. 1723
• Tabula horologica. Or Curieuse clock tables, by the help of which one can find the hour of the day by means of a small stick, sparrow's stick, foot measure or other thing, if it is only divided into 12 parts, in the sunshine, the hour of the day and other divertissements can be had Wobey (1) A sheet of copper which, according to the instructions, is made and used as a universal watch; at the same time a lesson on how to find the noon line with the universal clock and a horizontal clock, also how to find the hour of the night in moonlight. (2) An addendum is pointed out, first of all, how one can find the time of the clock with a stick or straw in hand when the sun is shining; secondly, how to set and correct the strike and pocket clocks correctly. Gottfried Richter, Hamburg, 1733.
• Instruction how to calculate the solar eclipses over every place on the earth's floor. Hamburg, 1734.
• Seven-fold royal large = British and chur = princely Braunschweig-Lüneburgischer Staats = calendar about Dero Chru = principality Braunschweig = Lüneburg, and the same associated country, to the year 1737. In it the improved, Gregorian, Julian, Jewish, Roman and Turkish, plus one Write = calendar included, other things belonging to the calendar can also be seen. Which is attached to all the state register of the royal governments and other high civil and military servants in the German lands; Also a genealogical directory of all the most noble high and high houses in Europe now living, according to the alphabet. 84 sheets, printing: Johann Christoph Berenberg, Lauenburg. Note: Published in this form for various years (continued from around 1752 by Matthias Rohlfs)
• Contemplation of the two great celestial lights, sun and moon. Hamburg: Samuel Heyl, 1736
• Consideration of the… great solar eclipse on July 25th of this year: as a supplement. . Contemplation of the great sky lights sun and moon, ... 1736
• Artificial numbers game, or thorough instructions on how to make the so-called magic squares in a very easy way, etc. 1742
• Royal Schleswig-Holstein House and Garden Allmanach: to the ... year of Christ; over the schleswig-holsteinis. Set the horizon. Altona: Burmester, 1750–1784. Initially: Nicolavs Rohlfs, then Matthias Rohlfs

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• Continuation and addition to Christian Gottlieb Jöcher's general lexico of scholars, edited by Otto Günther, Leipzig, 1897, pp. 299-300, online
• Lexicon of Hamburg writers up to the present, by Hans Schröder, Vol. 6, Hamburg 1873, No. 3266, online