Monthly Archives: February 2011

Errors In Measuring

In a post in November, 2010, called “2 Geodetic Surveys”, I described a geodetic survey done in Peru in the 18th century by a group of French scientists.  One technique that was used, and variations of it are always used … Continue reading

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Measuring Light

In my office window, I have a chunk of clear glass with a clock mounted in it, which, when the light in the afternoon hits it, projects amazing rainbows around the walls and floor of my office. I thought you … Continue reading

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