‘observation’ historical pictures (exact matches)

Claudius Ptolemy, Greco-Roman astronomer and mathematician and geographer
Claudius Ptolemy, Greco-Roman astronomer and mathematician and geographer
In 1911, Lt Giulip Gavotti became the first man to drop a bomb from a plane
In 1911, Lt Giulip Gavotti became the first man to drop a bomb from a plane
Discovering Our Cities: The Marvel of the Mersey (Liverpool). Jeremiah Horrocks.
Discovering Our Cities: The Marvel of the Mersey (Liverpool). Jeremiah Horrocks.
Il Presidente della Repubblica Francese alla fronte italiana
Il Presidente della Repubblica Francese alla fronte italiana
Observation balloon ascending, World War I
Observation balloon ascending, World War I
Percival Lowell
Percival Lowell
View of Aziscohos and Observatory Mountain, with Rangeley Lake in Maine in the foreground
View of Aziscohos and Observatory Mountain, with Rangeley Lake in Maine in the foreground
French Republic. Freedom – Equality – Fraternity.
French Republic. Freedom – Equality – Fraternity.
Leningrad. Autumn of 1941. At an Observation Post.
Leningrad. Autumn of 1941. At an Observation Post.
Mechanics: Atwood's machine with pulleys and calibrated dials, for measuring force
Mechanics: Atwood's machine with pulleys and calibrated dials, for measuring force
Marcello Malpighi, De pulmonibus observation
Marcello Malpighi, De pulmonibus observation
Navy Scout Observation Plane Spotting Fire of Big Guns, Anguar Invasion
Navy Scout Observation Plane Spotting Fire of Big Guns, Anguar Invasion
Sir Isaac Newton sees an apple fall
Sir Isaac Newton sees an apple fall
Conservation of rotten boroughs, & preservation of plebeian limbs very different
Conservation of rotten boroughs, & preservation of plebeian limbs very different
Elevation of the Belmont Menagerie, Newport, Rhode Island
Elevation of the Belmont Menagerie, Newport, Rhode Island
A Day at the Observatory on the Summit of Ben Nevis
A Day at the Observatory on the Summit of Ben Nevis
Erasistratus, a physician, realising that Antiochus's (son of Seleucus I) illness is lovesickness for his stepmother …
Erasistratus, a physician, realising that Antiochus's (son of Seleucus I) illness is lovesickness for his stepmother …
The Siege of Ladysmith
The Siege of Ladysmith
Bulletin de la Société belge d'astronomie
Bulletin de la Société belge d'astronomie
Ornatus Muliebris Anglicanus (The Clothing of English Women)
Ornatus Muliebris Anglicanus (The Clothing of English Women)