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Updated: May 19, 2025
Oliver mentions extraction of a lens by a thrust of a cow's horn. Lowe speaks of rupture of the anterior capsule of the lens from violent sneezing, with subsequent absorption of the lenticular substance and restoration of vision. Trioen mentions a curious case of expulsion of the crystalline lens from the eye in ophthalmia, through the formation of a corneal fissure.
Fore and aft rose two cages of medium height with inclined sides, and partly closed by thick lenticular glasses; one destined for the steersman who directed the Nautilus, the other containing a brilliant lantern to give light on the road. The sea was beautiful, the sky pure. Scarcely could the long vehicle feel the broad undulations of the ocean.
Hence geographers came to think of the habitable globe as having the somewhat lenticular shape which a crude map of these regions suggests.
Nothing was easier. In fact, under the wadding were four thick lenticular footlights, two let into the circular wall of the projectile, the third in its lower part, and the fourth in its cone. The travellers could, therefore, observe during their journey the earth they were leaving, the moon they were approaching, and the constellated spaces of the sky.
Similar elongated processes have been also observed to extend from the shells of some Belemnites discovered by Dr. The arenaceous limestone which passes under this name is generally grouped as a member of the Oxford clay, in which it forms, in the south-west of England, lenticular masses, 8 or 10 feet thick, containing at Kelloway, in Wiltshire, numerous casts of ammonites and other shells.
The mineral veins with which we are most familiarly acquainted are those of quartz and carbonate of lime, which are often observed to form lenticular masses of limited extent traversing both hypogene strata and fossiliferous rocks.
In Cheshire and Lancashire there are red clays containing gypsum and salt of the age of the Trias which are between 1000 and 1500 feet thick. In some places lenticular masses of pure rock-salt nearly 100 feet thick are interpolated between the argillaceous beds.
I examined the fittings of the apparatus, the strength of which was increased a hundredfold by lenticular rings, placed similar to those in a lighthouse, and which projected their brilliance in a horizontal plane. The electric lamp was combined in such a way as to give its most powerful light. Indeed, it was produced in vacuo, which insured both its steadiness and its intensity.
It was wholly in the lower ice, but close against the upper, and was flattish, or perhaps slightly lenticular, with a rounded edge, a quarter of an inch deep by four inches in diameter; and I was surprised to find that directly under the bubble the ice was melted with great regularity in the form of a saucer reversed, to the height of five eighths of an inch in the middle, leaving a thin partition there between the water and the bubble, hardly an eighth of an inch thick; and in many places the small bubbles in this partition had burst out downward, and probably there was no ice at all under the largest bubbles, which were a foot in diameter.
At a quarter to twelve the sun, then seen only by refraction, looked like a golden disc shedding its last rays upon this deserted continent and seas which never man had yet ploughed. Captain Nemo, furnished with a lenticular glass which, by means of a mirror, corrected the refraction, watched the orb sinking below the horizon by degrees, following a lengthened diagonal. I held the chronometer.
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