Figure 17. Luksch disk, made by Joseph Luksch about 1880 and used in that year aboard the HERTA, the yacht of Prince John II of Liechstenstein. It was provided with five interchangeable 36-cm reflecting plates of different metals, some painted. Afterwards, Luksch used polished white iron disks and white painted disks of 45 cm diameter on the POLA.
Photo Category: Oceanography - Historical instruments