Description
A Shelton compound pendulum regulator carried on the second of James Cook's three voyages around the world for use in astronomical observations
A view of the Royal Exchange's south front
1673' Gottfried Wilhelm Leibniz was elected a Fellow of the Royal Society in 1673
including details of the iris
1920s or early 1930s
Vintage Illustration of Five Blenders William Alfred A Shelton compound pendulum regulator
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