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Fireside Chat ’Above and Below: the Cornish pendulum experiments to weigh the world’

On-line, for SIS-members only.

Presented by Carolyn Kennett. Going down a Cornish mine with Carolyn Kennett. In 1826 and 1828 attempts were made by a group of eminent scientists including George Biddlell Airy and William Whewell to measure the density of the Earth. They would travel to the far southwest of England to Cornwall and down the deepest mine …

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Fireside Chat ‘Petrologic Microsopes’

On-line, for SIS-members only.

A typical example of a Petrologic Microscope. Presented by Thomas Schwarz, Germany. The second part of my collection: Petrologic microscopes. Giving a short introduction to this special kind of microscopy, I will start with the earliest genuine mineralogical microscopes made by the Berlin Maker, Rudolph Fuess. I will then continue to show the evolution of the …

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