American physician John Jeffries (1744-1819), who performed first wheather observations from gas balloon. He accompanied Jean-Pierre Blanchard on his 1785 balloon flight across the English Channel.

Autor:

Caroline Watson

Credit:

Richard Aßmann und Arthur Berson (Hrsg.): „Wissenschaftliche Luftfahrten“, Band 1, Vieweg, Braunschweig 1899, Fig. 1, S. 17.

Krótki link:

https://www.plwiki.pl/b/5e5c9

źródło:

Wikimedia Commons

Wymiary:

935 x 1256 Pixel (630384 Bytes)

Licencja:

Public domain