("Regnier Gemma-Frisius") returned 3 hits
1
Theoretical description of how longitude may be determined using difference of times by a clock and the associated observed change in star positions (not implemented)
Category:
Statistics & Graphics
2
Description of how to determine mapping locations by triangulation, from similar triangles, and with use of angles w.r.t meridians
Category:
Statistics & Graphics
3
The first published illustration of a camera obscura, used to record an eclipse of the sun, on January 24, 1544.
Category:
Technology
