
Title
Van Hecke's propeller to allow balloons to rise and descend at will
Caption
Engraving depicting Van Hecke's propeller to allow balloons to rise and descend at will. Dated 20th Century
Date
20th century
Credit line
Photo12/Ann Ronan Picture Library
Reference
ARP23A14_274
License type
Rights managed
Available size
60,0Mb (4,5Mb) / 19,0in x 12,3in / 5692 x 3684 (300dpi)