Sketch of a Parseval airship (1906). Extracted from scan of <a href="//commons.wikimedia.org/wiki/Category:Meyers_Blitz-Lexikon" title="Category:Meyers Blitz-Lexikon">Meyers Blitz-Lexikon</a>, Leipzig, 1932 (cropped, cleaned and converted to greyscale).
<a href="//commons.wikimedia.org/wiki/Category:Meyers_Blitz-Lexikon" title="Category:Meyers Blitz-Lexikon">Meyers Blitz-Lexikon</a>, Leipzig, 1932
<a href="//commons.wikimedia.org/wiki/Category:Meyers_Blitz-Lexikon" title="Category:Meyers Blitz-Lexikon">Meyers Blitz-Lexikon</a>, Leipzig, 1932