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![Figure 17 ship4020.jpg Figure 17](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_ship4020.jpg?itok=tWwed0I0)
Description
Figure 17. Luksch disk, made by Joseph Luksch about 1880 and used in that yearaboard the HERTA, the yacht of Prince John II of Liechstenstein. It was provided with five interchangeable 36-cm reflecting plates of different metals, somepainted. Afterwards, Luksch used polished white iron disks and white painteddisks of 45 cm diameter on the POLA. (Image credit: Oceanographic Museum of Monaco | P. Roggero)