Standard Deviation du Printemps
9 March 2008
The camellias are blooming, and have been for a week or two. There was still a light frost this morning, though, and that helped me hang on to Saturn high up near Leo’s paws and Mars seeming to recede into the winter hexagon, glimpsed on my way home last night. Now that I look around a little more, the red maple close up against the kitchen porch is also budding strenuously, preparing to leaf out.
I haven’t been paying attention to climatological data, and there are unfortunately few lilacs nearby, but it still brings to mind Adolphe Quetelet’s prescription for lilacs; I think his test bed, so to speak, was in Paris, but I could be wrong. In any case, when the sum of the squares of the mean daily temperatures since the last frost of the winter exceed 4,274, look for the clustered clouds of little purple flowers.
Given that Quetelet was writing in 19th century Belgium, I think we can assume that he was talking about mean temps in Celsius. Odd to think of one of the effects of the French Revolution being the metric system, but there you go. This kind of social context and personal effects are precisely why I liked David Salsburg’s The Lady Tasting Tea, from whence I learned the Quetelet story. In general the book was excellent, but now that I reflect, I think I may have dropped out about half way through when the statistics got too deep for me. I’ll have to pick it up again.