Thomas Alva Edison: sixty years of an inventor's life (Google eBook)

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T. Y.Crowell & co., 1908 - 362 pages
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Page 6 - I was always a careless boy, and with a mother of different mental caliber I should have probably turned out badly. But her firmness, her sweetness, her goodness, were potent powers' to keep me in the right path.
Page 117 - ... one of the machines to see how things were. My heart was in my mouth at first, but everything worked all right and we had more than 500 ohms insulation resistance. Then we started another engine and threw them in parallel. "Of all the circuses since Adam was born, we had the worst then.
Page 7 - ... her sweetness, her goodness, were potent powers to keep me in the right path, I remember I used never to be able to get along at school. I don't know what it was, but I was always at the foot of the class. I used to feel that the...
Page 165 - Edison stated that he was attempting to devise "an instrument which would do for the eye what the -phonograph does for the ear, and that by the combination of the two all motion and sound could be recorded and reproduced simultaneously.
Page 130 - When wound in the form of a spiral it is as springy and elastic when at the most dazzling incandescence as when cold, and cannot be annealed by any process now commonly known. " For the cause of this shrinking and cracking of the wire is due entirely to the expansion of the air in the mechanical and physical pores of the platinum, and the contraction upon the escape of the air.
Page 129 - If a short length of platinum wire one-thousandth of a inch in diameter be held in the flame of a Bunsen burner, at some part it will fuse, and a piece of the wire will be bent at an angle by the action of the globule of melted platinum ; in some cases there are several globules formed simultaneously, and the wire assumes a zigzag shape. With a wire...
Page 111 - The invention further consists in placing such burner of great resistance in a nearly perfect vacuum, to prevent oxidation and injury to the conductor by the atmosphere. The current is conducted into the vacuum bulb through platina wires sealed into the glass.
Page 123 - And upon a time went the burgesses' daughters to play in the palace, and they beheld the metal man, and one of them asked in sport why he shot not; and then she came to the man and with her hand touched the bow, and then the bow flew out and break the lamp that Virgilius made.
Page 111 - I have discovered that even a cotton thread properly carbonized and placed in a sealed glass bulb exhausted to one millionth of an atmosphere, offers from one hundred to five hundred ohms...
Page 106 - We had to take this piece of carbonized thread to the glass-blower's house," he said. "With the utmost precaution Batchelor took up the precious carbon, and I marched after him, as if guarding a mighty treasure. To our consternation, just as we reached the glass-blower's bench the wretched carbon broke.

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