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Excerpt from System of Diseases of the Eye, Vol. 2: Examination of the Eye, School Hygiene, Statistics of Blindness, and AntisepsisGreen2 and Ewing, of St. Louis, have published a series of test-letters based upon a definite geometrical progression (a: r: 7 95 nearly). They thus obtain a scale in which the intervals are all equal. The numbers on this scale are

Title : System of Diseases of the Eye, Vol. 2: Examination of the Eye, School Hygiene, Statistics of Blindness, and Antisepsis (Classic Reprint)
Author : William Fisher Norris
Language : en
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Type : PDF, ePub, Kindle
Uploaded : Apr 06, 2021

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