Dr John Jeffries, American balloonist, 1786. Jeffries (1744-1819) during a balloon ascent to investigate the atmospheric temperature. On 7 January, 1785, Jeffries and French balloonist Jean Pierre Blanchard made the first successful balloon flight across the English Channel. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Heritage Images / Oxford Science Archive |
Bildgröße: | 3687 px × 4737 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |