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Pictures of ‘observation’ (exact matches)

Giovanni Schiaparelli, Italian astronomer
Giovanni Schiaparelli, Italian astronomer
X rays - frustrated safebreakers
X rays - frustrated safebreakers
X rays - I've nothing to worry about, he already has a little negro in his stomach
X rays - I've nothing to worry about, he already has a little negro in his stomach
On reconnaissance
On reconnaissance
X rays - a thousand apologies for the disturbance commissioner, it's not my wife
X rays - a thousand apologies for the disturbance commissioner, it's not my wife
The first military balloon at the Battle of Fleurus, 1794
The first military balloon at the Battle of Fleurus, 1794
Balloon
Balloon
Observation balloon ascending, World War I
Observation balloon ascending, World War I