
Title
A valve mechanism of a hydrogen balloon
Caption
Illustration depicting a valve mechanism of a hydrogen balloon. Dated 19th Century
Date
19th century
Credit line
Photo12/Ann Ronan Picture Library
Reference
ARP23A12_423
License type
Rights managed
Available size
180,0Mb (11,1Mb) / 27,9in x 25,1in / 8365 x 7521 (300dpi)