Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 404
e are theappearances of an air-bubble in water and Canada balsam. The figures which illustrate the appearance at various points of the focus of an air-bubble in water and Canada balsam, and of ;ifat-globule in water, may be thus illustrated, viz. a diaphragm ofabout rj of a mm. being placed at a… … Fig. 818.—Air-bubbles in (1) water, {!) Canada balsam; (:\) fat-globules in water. to the middle of the bubble (B), the centre of the image is seen to be.very bright—brighter than the rest of the Held. It is surrounded bya greyish zone, and a somewhat broad black ring interrupted by oneor more…
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