Kapteyn's measuring device.
Jacobus Kapteyn started to measure all the photographic plates from the
Cape Observatory at the end of the nineteenth century. For this
purpose he constructed a device.
[more]
The Würzburg Riese radar antenna.
During the Second World War, the German army created the Atlantic Wall along
the entire European coast, all the way from Norway, through Denmark,
the Netherlands, Belgium and France.
Part of this Kammhuberlinie were overlapping
radarstations, equipped with the so-called Würzburg Riese radar antennas,
7.5 meter in diameter.
[more]
WITH THANKS TO
 |
 |
 |
 |
