See Also: Ringelmann(dictionary)

Ringelmann (iou)



Ringelmann noun. L19.
[Origin uncertain: perh. from Maximilien Ringelmann (1861-1931), French scientist.]
Used attrib., and formerly in possess., with ref. to the estimation of the darkness and density of smoke by visual comparison with a chart bearing different shades of grey (formed by lines ruled with different spacings on a white card), as Ringelmann card, Ringelmann chart, Ringelmann scale.