Brewster, David, Sir, 1781-1868, Bache, A. D. (Alexander Dallas), 1806-1867 · Philadelphia : Lea and Blanchard · leaf 171
black cross, A B C D, the arms of which meet at the centreof the rings. The colors in these rings are exactly the sameas those in Newtons Table of colors, and consequently the *• cnAP. xxrr. kings in crystals with one axis. 167 same as the system of rings seen by reflexion from the plateof air…
Optics
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