Brewster, David, Sir, 1781-1868, Bache, A. D. (Alexander Dallas), 1806-1867 · Philadelphia : Lea and Blanchard · leaf 172
of air between the object glasses. If we turn the rhombround its axis, the rings will suffer no change ; but if we fixthe rhomb, or hold it steadily, and turn round the plate B,then, in the azimuths 0°, 90°, 180°, and 270° of its revolution,we shall see the same system of rings; but at the… … in the rings formed by transmission through the plate of air.The superposition of these two systems of rings would repro-duce white light If, in place of the glass plate B, we substitute a prism ofcalcareous spar, that separates its two images greatly, or arhomb of great thickness, we shall see in…
Optics
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