Word: optic
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...bright pink retina of the eye can be photographed straight through the pupil with a Zeiss retinal camera. As reference points for classification, veins are chosen in preference to arteries because they are thicker and show up darker in photographs. The main vein which enters the eyeball with the optic nerve branches in two, and each branch again forks, providing four prominent veins meandering across the retina in irregular directions.* The entrance point of the optic nerve itself is taken as a point of reference. The distances and directions of the vein forks from this reference point provide coordinates which...
...hardening of the eyeballs. Salt and water in the blood seep out of the blood vessels of the eye and into the eye's cavity. Because this salty liquid cannot escape, it jams the retina against the wall of the eye, slowly destroys the tasseled end of the optic nerve. Vision dims, blindness ensues. Drugs have proved of little help; surgery gives only temporary relief...
...feast days. Of the cures registered and checked by physicians before and after every health-seeking visit, none is a "first class" miracle involving growth of new bone tissue. Typical "second class" cures reported from the Oratory are restoration of sight lost from atrophied optic nerves, healing of tuberculosis, cancer, gangrene, paralysis, rheumatism. Now 89, frail, wrinkled Brother Andre is still officially no more than "caretaker" of the shrine. To visitors who seek him out as they did last week he invariably says...
...case of tritium, triple-weight hydrogen, is different. Its discovery was foreshadowed by the somewhat dubious magneto-optic method which anticipated the identification of deuterium. Then, in England, Lord Rutherford bounced deutons (deuterium nuclei) together, got protons and something of mass three which he thought was either an unknown form of helium or triple-weight hydrogen. Cautious Lord Rutherford took his time ascertaining that the new particles were both helium and tritium. Meantime Dr. Merle Antony Tuve and his associates at the Carnegie Institution of Washington had identified tritium particles by measuring their mass as indicated by the curvature...
...isotopes of its own. Birge of the University of California and Menzel of Harvard showed that the difference would be erased if one atom of hydrogen in every 4,500 had a nucleus twice the weight of the common nuclei. Allison of Alabama Polytechnic Institute found some curious magneto-optic effects in hydrogen which he chose to explain by the presence of a double-weight isotope...