Hans Johow

Hans Johow (born March 5, 1856 in Oldisleben (Thuringia), † November 10, 1893 in Berlin ) was a shipbuilding engineer and became known in the professional world through the publication of "Johow's auxiliary book for shipbuilding".

Hans Johow - studied at the Royal Trade Academy, today TU-Berlin

Johow studied shipbuilding here

Hans Johow was born on March 5, 1856 in Oldisleben (Thuringia) under the name Oscar Heinrich Baum. In 1857 he was adopted by the later Berlin “Geheime Ober-Justizrath” at the local court, Reinhold Johow and his wife Marie, nee. Hallervorden, under the name of Hans Heinrich Oscar Johow.

He enjoyed a brief training from 1873 to 1874 in the drawing office at the Stettiner Maschinenbau Actien-Gesellschaft Vulcan, founded in 1857 . From 1875 to 1879 he studied shipbuilding at the Berlin Royal Trade Academy, the forerunner of today's Technical University of Berlin . He then performed the one-year military service that was then mandatory. According to his own statement, with the "coastal and fortress artillery"; apparently in Cuxhaven.

Marine engineer aspirant of the Imperial Shipyard Kiel

In January 1881 he took up service as a "marine engineer aspirant" in the Kaiserliche Werft Kiel . In 1886 he was listed as a “shipbuilding engineer” at the Kaiserliche Werft in Kiel and a year later he was accepted into the “ Royal Institution of Naval Architects ” (RINA), London. Hans Johow married on October 26, 1888 in Belum / Amt Neuhaus (Elbe) in Lower Saxony the "house daughter" Meta Wisch, who was born there on December 8, 1867. Professionally, he was promoted to "Marine Shipbuilding Engineer 1st Class" on March 24, 1890, which was then to be promoted to "Marine Builder" in 1891. In addition to his work at the Kaiserliche Werft in Kiel, Hans Johow can be identified in the files of the Freiburg Federal Archives / Military Archives as a lecturer at the then Marine Academy in Kiel.

As a "marine engineer aspirant" at the Imperial Shipyard in Kiel

On January 21, 1892, Hans Johow's farewell permit was granted by the Kaiserliche Werft in Kiel, combined with a statutory pension and retirement. Hans Johow died on November 10, 1893 in Berlin at the age of only 37.

Johows help book for shipbuilding

This is what it was called in the later editions, the first being published in 1884 by Julius Springer Verlag in Berlin . The later editions appeared under the name "Johow-Krieger" (2nd edition 1902, 3rd edition 1910) and was supplemented by Eduard Krieger and other authors. The 4th and 5th editions (1920, 1928) were continued by Ernst Foerster as "Johow-Foerster". This work had in the meantime developed into a standard work, had grown considerably in scope and therefore appeared in two volumes. It is astonishing that Johow had already written it at the age of 28.

In 1888/89 his second textbook appeared, the “Kreuzer Korvette“ Problem ””. A nautical technical study. It was published by the publisher Lipsius & Tischer, Kiel and Leipzig and was not as well known as his first work. In the "Foreword" to the annotated new edition of this book it is said: "It is astonishing that he partially carried out the calculations up to the fourth digit after the decimal point". The reason for this new edition can be found in the "Introduction" there, where it says: "From our point of view, the study documents the work of a shipbuilding engineer at that time with the means available to him".

literature

• H. Johow: The cruiser corvette "Problem": A nautical-technical study. Verlag Lipsius & Tischer, Kiel / Leipzig 1889. (New edition: H. Haaker, C. Johow, J. Lessenich (Eds.), Verlag Fines Mundie, Saarbrücken 2009, ISBN 978-3-937246-11-6 )
• E. Johow-Foerster: Johows auxiliary book for shipbuilding. 2 volumes. 4th, revised edition. Springer, Berlin 1920.