from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An instrument for measuring the intensity of blue colour.
from the GNU version of the Collaborative International Dictionary of English
- n. An instrument for measuring degress of blueness.
from The Century Dictionary and Cyclopedia
- n. A meteorological instrument contrived by Saussure for estimating or measuring degrees of blueness, as in the sky.
He also developed numerous other instruments, including the manometer, cyanometer, diaphonometer, anemometer and mountain eudiometer, the first electrometer (1766), a device for measuring electric potential by means of attraction or repulsion of charged bodies, and the first hygrometer, utilizing a human hair to measure humidity (1783).
The sky color shifts in value from zenith to horizon, too, as we can see when the cyanometer is arrayed vertically.
I took a single paint swatch, cut it in half, and taped the symmetrical halves on a mirror to make a device that we can call a "cyanometer."
He would study geology in the field, and took Saussure in his trunk he would note meteorology: he made a cyanometer -- a scale of blue to measure the depth of tone, the colour whether of Rhine-water or of Alpine skies.
Its intensity at the zenith appeared to correspond to 41° of the cyanometer.
It corresponded only to 12 degrees of the cyanometer.
Thermometer 21; hygrometer 39.3; cyanometer 16 degrees.
This intensity, measured with the cyanometer of Saussure, was found from November to January generally 18, never above 20 degrees.
Its intensity at the zenith appeared to correspond to 41 degrees of the cyanometer.
Saussure, Horace Bénédict de, _Essai sur Hygrométrie_, inventor of the cyanometer, _vi.
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