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A hydrogen generating machine used in the inflating of military balloons
ARP23A14_327

A hydrogen generating machine used in the inflatin...

A hydrogen generating machine used in the inflating of military balloons
ARP23A14_328

A hydrogen generating machine used in the inflatin...

A hydrogen generating machine used in the inflating of military balloons
ARP23A14_326

A hydrogen generating machine used in the inflatin...

The inflating of the balloon 'Hirondelle'
ARP23A14_244

The inflating of the balloon 'Hirondelle'

President McKinley delivering a speech
ARP18A17_082

President McKinley delivering a speech

William Jennings Bryan inflating a large balloon
ARP18A15_069

William Jennings Bryan inflating a large balloon

World War I : Inflating a captive balloon
ARP10A02_095

World War I : Inflating a captive balloon

American military balloon unit
ARP07113_010696P

American military balloon unit

Inflating balloon with hydrogen
ARP07098_390002728

Inflating balloon with hydrogen