Elementary treatise on physics, experimental and applied, for the use of colleges and schools; (1904)
Ganot, A. (Adolphe), 1804-1887, Atkinson, Edmund, 1831-1901, tr, Reinhold, Arnold William, 1843- ed · New York, W. Wood & Co. · leaf 693
entary, and the black cross changesinto white. The angle between the optic axes in the case of nitre is only 5° 20,and hence the whole system can be seen at once. But when the angle exceeds20° to 25°, the two systems of curves cannot be simultaneously seen. Thereis then only one dark brush instead…
Physics
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