[{WikipediaArticle oldid='248601604'}]

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| Heliostat by the Viennese scientific instrument maker Johann Michael Ekling (ca. 1850)| Eigenes Werk| Julius Eugen| [{Image src='https://www.austria-forum.org/cc/images/slim/by-sa.png' alt='CC BY-SA 3.0' align='center' link='https://www.austria-forum.org/cc/by-sa-30.html' target='_blank'}]| Datei:Ekling Heliostat.JPG
| Nobili multiplicator from the Historical Collection of the Faculty of Physics, University of Vienna (1834)| private email| Prof. Dr. Franz Sachslehner| [{Image src='https://www.austria-forum.org/cc/images/slim/by-sa.png' alt='CC BY-SA 3.0' align='center' link='https://www.austria-forum.org/cc/by-sa-30.html' target='_blank'}]| Datei:Multiplicator Nobili 1834.jpg
| Nadelglockentelegraf (Streckensignalgerät), 1846, System A. Bain, Johann M. Ekling, Wien; Exponat im Technischen Museum Wien| Eigenes Werk| Dr. Bernd Gross| [{Image src='https://www.austria-forum.org/cc/images/slim/by-sa.png' alt='CC BY-SA 4.0' align='center' link='https://www.austria-forum.org/cc/by-sa-40.html' target='_blank'}]| Datei:Nadelglockentelegraf 1846.JPG
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