nobrashfestivity:Eduard Pechuël-Loesche, Studies on Twilight Phenomena, after Krakatoa, Published 18
nobrashfestivity:Eduard Pechuël-Loesche, Studies on Twilight Phenomena, after Krakatoa, Published 1888-Cloud Shadow After the Disturbance Period. (Midday) — Jena, September 10th 1887-Cloud Shadow With Red Diffusion Light During the Disturbance Period. (Midday) — Jena, April 24th 1884. -- source link