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REPSOLD, JOHANN GEORG (1771–1830)

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Originally appearing in Volume V23, Page 136 of the 1911 Encyclopedia Britannica.
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REPSOLD, JOHANN GEORG (1771–1830) , See also:German See also:instrument maker, was See also:born at Wremen in See also:Hanover on the 23rd of See also:September 1771, and became an engineer and afterwards See also:chief of the See also:fire See also:brigade in See also:Hamburg, where he started business as an instrument maker See also:early in the 19th See also:century. He was killed by the fall of a See also:wall during a fire at Hamburg on the 14th of See also:January 183o. The business was continued by his sons Georg (1804–1884) and Adolf (1806-1871), and his grandsons Johann Adolf and Oskar Philipp. J. G. Repsold introduced essential improvements in the See also:meridian circles by substituting microscopes (on See also:Jesse See also:Ramsden's See also:plan) for the verniers to read the circles, and by making the various parts perfectly symmetrical. For a number of years the See also:firm furnished meridian circles to the observatories at Hamburg, See also:Konigsberg, Pulkova, &c.; later on its activity declined, while Pistor and Martins of See also:Berlin See also:rose to See also:eminence. But after the discontinuance of this firm that of Repsold again came to the front, not only in the construction of transit circles, but also of See also:equatorial mountings and more especially of heliometers (see MICRO- See also:METER).

End of Article: REPSOLD, JOHANN GEORG (1771–1830)

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