After the chaos of British politics, it is almost a pleasure to turn to the simple certainties of Ayn Rand, So certain that those who disagreed with her deserved nothing better than to be packed onto a train and sent into a dark tunnel from which they would never emerge.
The experiment described by George Airy in his 1857 paper entitled “Account of pendulum experiments undertaken in the Harton colliery, for the purpose of determining the mean density of the Earth” produced an estimate of the mean density of the Earth that was 20% in error. Why was this?
In 1831 Dumont Durville made a contribution to the Bulletin of the Société de Géographie that was billed as a book review. It began, however, not with a discussion of the book in question but with an extended rant against the French naval establishment.
It was probably not a good idea on my part to get involved in a purely American tragedy, but I had an excuse. A fellow Brit had posted a comment suggesting that he thought that US-style gun control, or lack of it, would be a good idea in the UK. I thought some opposition to that would be worth while.
After his failure to measure the mean density of the Earth in the Dolcoath mine in Cornwall in 1826, George Airy waited 30 years before making another attempt. For this he went to the Harton Pit near South Shields and used innovations such as electrical signalling. But was he any more successful?
One of the criticisms faced by Ayn Rand in her lifetime was that her ‘rational men’simply did not exist. To this she had a standard answer. “I know they do. I married one. His name is Frank O’Connor.”