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Certain snails present the same characteristics as these two forms of sugar. Some are coiled to the right and others to the left; and it is remarkable that, like dextrose and levulose, their juices are optically the reverse of each other when studied by polarized light.
His indication points to nothing less than a leading over of the optically produced spectrum from its usual linear form, with two boundaries on either side, into a closed circular form, and of doing this by an adequate application as yet undiscovered of magnetic force.
The greater power of the two, she seems, with a quiet derision that does not belie her amiable passivity, to have reduced in Beauchamp's career the boldest readiness for public action, and some good stout efforts besides, to the flat result of an optically discernible influence of our hero's character in the domestic circle; perhaps a faintly-outlined circle or two beyond it.
You know exactly where it is, you can draw it, you can define it, compute it, and work with it but still it doesn't exist; there is absolutely nothing to differentiate it from any other volume of air, and it cannot be detected by any physical or mechanical means. If, however, you place a light at the point of projection, the shade becomes actual and can be detected optically.
But she was ashamed to face the saleswoman again, and her elation was not to be repressed an elation optically presented by a huge electric sign on the farther side of the street that flashed through all the colours of the spectrum, surrounded by running fire like the running fire in her soul.
Count Bragard had declined the evening promenade in favour of The Enormous Room, but I perceived in the crowd the now familiar faces of the three Hollanders John, Harree and Pompom likewise of The Bear, Monsieur Auguste, and Fritz. In the course of the next hour I had become, if not personally, at least optically acquainted with nearly a dozen others.
A tuning-fork, kept vibrating, by means of an electro-magnet, at 2000 times per second, may to our sense of sight be gradually slowed down and, optically, brought absolutely to a standstill, for as long as desired, and the smallest irregularity of its surface may be minutely examined, though it continues to be heard and felt vibrating at that enormous rate.
Not all that is optically possible to be seen, is to be shown in every picture. The eye delightedly dwells upon the brilliant individualities in a "Marriage at Cana," by Veronese, or Titian, to the very texture and colour of the wedding garments, the ring glittering upon the bride's fingers, the metal and fashion of the wine pots; for at such seasons there is leisure and luxury to be curious.
Here and there, in a kind of sonal darkness, solid sincere unintelligible absurd wisps of profanity heavily flickered. Optically the phenomenon was equally remarkable: seated waggingly swaying corpselike figures, swaggering, pounding with their little spoons, roaring, hoarse, unkempt. Evidently Monsieur le Surveillant had been forgotten. All at once the roar bulged unbearably.
"Those sailors we saw, Queequeg, where can they have gone to?" said I, looking dubiously at the sleeper. But it seemed that, when on the wharf, Queequeg had not at all noticed what I now alluded to; hence I would have thought myself to have been optically deceived in that matter, were it not for Elijah's otherwise inexplicable question.
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