Kater's invariable pendulum and clock for gravity observations, Sumatra Product:Framed picture View over water at sunset

View over water at sunset

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George Porter was elected a Fellow of the Royal Society in 1960

Full length portrait showing him leaning against a cannon

Bust of a man in a gorget and a feathered beret

Kater's invariable pendulum and clock for gravity observations, Sumatra Product:Framed picture View over water at sunsetFront elevation showing the Kater invariable pendulum and supporting frame before a clock as set up at the Madras Observatory and used in John Goldingham's temporary expedition observatory. With a secondary figure showing the distance from the pendulum to the small observing telescope. Figure no. 4 from Report of the length of the pendulum at the equator made on an expedition from the observatory at Madras, by John Goldingham (Madras, 1824). Scale 1