Greetings! Since I’m a historian of science, I thought my first post in this space should celebrate the cyanometer, the device Alexander von Humboldt (among others) used to determine just how blue any sky actually is
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A part of my brain started running through some questions.
How was that scale and its limits devised? How is it calibrated? How do you reduce the change of colour over time and over repeated exposure to sunlight. Do you measure a few spots in the sky and calculate the mean?
How was it made to make sure that, for example, a 12 on one cyanometer is the same as a 12 on another? If I were doing it *now* there'd be gradient arithmetic and HSV-RGB conversions involved, but that can't be what they did then.
Hey it looks just like my jeans! (I assume both denim and this doodad used indigo pigment originally, and that's why the shades remind me of each other even beyond their general blueness)
I plan on suggesting this device be used to measure how "dark/light" jeans are at work. The rules say dark is OK and light is bad but there is no reference.
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Have you read The Invention of Nature yet?
(At first glance I thought that was one of those indigo fading test things for textile dyes)
How was that scale and its limits devised? How is it calibrated? How do you reduce the change of colour over time and over repeated exposure to sunlight. Do you measure a few spots in the sky and calculate the mean?
Wow I'm a nerd, love it!
So this is a
🕶️
Sky rim
😎
Keep up the good work
🎩
This looks interesting! What is this information used for? Does it have to do anything with Air quality, weather, or something else?
#YaySciencePlusArt
#STEAM