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Updated: May 16, 2025
Still another way of baking is in a reflector oven of tin. This is highly satisfactory, provided the oven is built on the scientific angles to throw the heat evenly on all parts of the bread-pan and equally on top and bottom. It is not so easy as you might imagine to get a good one made. These reflectors are all right for a permanent camp, but too fragile for transportation on pack-animals.
In reflectors this is effected by giving a parabolic form to the concave surface of the mirror. In refractors there is a twofold difficulty to be overcome. In the first place, a lens with spherical surfaces does not bend all the rays that pass through it to a focus at precisely the same distance.
Moonlight, apple-blossoms, nightingales, with the souls of men and women for mirrors and reflectors! The picture is for the musician not the painter, either him of words or him of colours. It was like a lovely show in the land of dreams, even to the living souls that moved in and made part of it.
"The glare of the silver-foil reflectors is unbearable," she looked up, with a pointed and famous effect. "But you don't like me?" "I do; aside from that, though, I'm not sure; probably because you are so remote and cold." "Thank God!" she replied. "You haven't stopped to think where I'd be if I weren't. And yet, no one, in their work, is supposed to be more emotional.
Seats for the three hundred spectators were drawn closely around this. Suspended just above the open top of the cage were two big oil lamps with glass reflectors. It was eight o'clock when Harker, McTrigger and two other men bore Kazan to the arena by means of the wooden bars that projected from the bottom of his cage. The big Dane was already in the fighting cage.
The system was soon introduced into England; and one of the first acts of the Northern Lights’ Board, so early as 1786, was to substitute reflectors in place of coast-lights, which till then had been the only beacons on the Scotch coast. In the improved lights the best spermaceti oil and the Argand lamp have been introduced.
Then shone out the glare of torches at the river bank, and a savage yell announced that the men had discovered the injury done to the canoes. One of the purchases made in London had been a lamp with very fine reflectors. This Mr.
Tom slipped away from Roger and moved to the opposite side of the ship. Slinging the rifle over his shoulder, he climbed up the ladder silently toward the open port. Making his way noiselessly through the air lock, he entered the huge main deck of the ship and was able to see his way around by the faint glow of the emergency reflectors in the bulkheads.
And here there was a considerable expanse fenced in almost an acre, it seemed. There were metal-walled small buildings with innumerable antennae of every possible shape for the reception of every conceivable wave length. There were three radar bowl reflectors turning restlessly to scan the horizon, and a fourth which went back and forth, revolving, to scan the sky itself.
Passing now from these large reflectors to refractors, further improvements have been made in the manufacture of glass by Chance, of Birmingham, Feil and Mantois, of Paris, and Schott, of Jena; while specialists in grinding lenses, like Alvan Clark, of the U.S.A., and others, have produced many large refractors.
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