CYANOMETER

Dictionary of Science, Literature and Art · 1842 · p. 12

(Yunanca köken — orijinale bakınız.) An instrument contrived by Sau ure for determining the deepne of the tint of the atmosphere. A circular band of thick paper or pasteboard is divided into 51 parts, each of which is painted with a different shade of blue, decreasing gradually from the deepest blue X 3 [s. 322]