Observes posters & prints

Horse sticking head out stable window Anonymous

The old observing-room, Greenwich Anonymous

Taking Observations with a Sextant Andrew Pitcairn-Knowles

Killer Whale Breaching, British Columbia, Canada. Anonymous

Observing with the dipleidoscope Unknown

Observing a solar eclipse, 1673 Unknown

Temporary observatory for pendulum observations, Sumatra unknown

First Navy Observation Balloon Anonymous

Michael and Mrs. Faraday Observing Experiment Anonymous

An Indian spy observes the arrival of a Spanish ship on the Mexican coast, 1579 Diego Duran

Newsboy selling 'The Observer' English School

Observers, 2011 Vincent Alexander Booth

Family Observing a School Construction Site Anonymous

Lovers observed George Morland

Observing a total solar eclipse, 1851 (1857) Anonymous

Henry VIII and Anne Boleyn Observed by Queen Catherine, 1870 Marcus Stone

I.K. Brunel and Others Observing the Great Eastern Launch Attempt Robert Howlett

On the Lookout Wilhelm Kuhnert

Skyway and Observation Towers at Century of Progress Anonymous

A look-out on the bridge of a British warship Gregory & Co

Worker Observing Finished Product Anonymous

US Observation Planes Flying in Battle Formation Anonymous

1960s Family Mother Father Son Daughter Watching Television In Living Room Indoor Anonymous

Antoine Lavoisier Showing Water Experiment to Observers Anonymous

Paris Observatory, France, 1740 Unknown

Commander Evans observing an Occulation of Jupiter Herbert Ponting

Temporary observatory for pendulum observations, Sumatra unknown

Commander Evans observing an Occulation of Jupiter, Antarctica, 1910-1912 Herbert Ponting

Chess, 1812 John Harden

Napoleon III at the Battle of Solferino Jean Louis Ernest Meissonier

Anatomy Class Observing Corpse Anonymous

Eight Bells - Midday Observation Winslow Homer

1960s Man Jumping Waving Checkered Flag As Winning Sports Car Crossing The Finish Line Anonymous

Night Manoeuvres Peter A Ford

Amundsen Observing with Partners Anonymous

Observation of Yellow Fever, c.1819 Charles Lasteyrie du Saillant