Could metrication have shortened World War I by 2 years, and saved millions of lives?

In a follow up to an article last year, about the occasion in 1904 when Parliament came close to fully-adopting the metric system, we consider one of the possible consequences of this failure.

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Speedometers and Metrication

How are speedometers designed to accommodate the change from mph to km/h? In this article I will examine a variety of techniques and at the end of the article I will propose a 21st Century solution.

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