Bibliotics; or, The study of documents; determination of the individual character of handwriting and detection of fraud and forgery. New methods of research (1901)
Frazer, Persifor, 1844-1909 · Philadelphia : Lippincott · leaf 273
sm. Let e = Angle of prism BOA. Then : The fraction of the yellow and blue rays absorbed by the redprism at point {a,b.^c) = (CH -!- HJ) R.The fraction of the red and blue rays absorbed by the yellow prism at point {ri,b,c) ^ (CH + HJ) Y.The fraction of the red and yellow rays absorbed by the… … and I depends on a, through the rehition b =^ a tan e, in which 0 isthe prism angle. Fig. 2.
Writing -- Identification · Forgery · Graphology
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