 | 1833 - 494 頁
...bout de Varbre d'un tour en Vair,) and by means of a pedal he caused this magnet to revolve before a bar of soft iron, bent into the form of a horse-shoe; this -was enveloped in a copper wire covered with silk. The two extremities of this wire were made... | |
 | John M. Moffat - 1834 - 530 頁
...supporting the weight of about 750 pounds ; and they have since formed another which it is said will sustain 2063 pounds, or nearly a ton. It consists of a bar...twenty-eight feet of each actually surround the iron ; the aggfegate length of the coils is therefore 728 feet. Each strand is wound on a little less than an... | |
 | Walter Rogers Johnson - 1835 - 530 頁
...electricity from any particular source ? What arrangement gives the greatest facility in producing the magne tism of steel bars ? How may the voltaic magnet be...iron ; the aggregate length of the coils is therefore 728 feet. Each strand is wound on a little less than an inch : in the middle of the horseshoe it forms... | |
 | Institution of Civil Engineers (Great Britain) - 1892 - 520 頁
...an oscillating armature, and two mercury contacts, form the principal parts. The core of the magnet consists of a bar of soft iron, bent into the form of a closed rectangle. About half the length of the longest side is then cut out, and forms the armature,... | |
 | Richard Green Parker - 1838 - 266 頁
...a weight of 750 pounds. They have subsequently constructed another, which will sustain 2063 pounds. It consists of a bar of soft iron, bent into the form...iron. The aggregate length of the coils is therefore 72d feet. Each strand is wound on a little less than an inchi in the middle of the horse-shoe it forms... | |
 | Richard Green Parker - 1839 - 298 頁
...a weight of 750 pounds. They have subsequently constructed another, which will sustain 2063 pounds. It consists of a bar of soft iron, bent into the form...horse-shoe, and wound with twenty-six strands of copper bell- wire, covered with cotton threads, each thirtyone feet long ; about eighteen inches of the ends... | |
 | John Frederic Daniell - 1839 - 606 頁
...wire, PN, of a Voltaic circuit, covered with silk, to prevent metallic contact, wrapped spirally round a bar of soft iron, bent into the form of a horse-shoe. While the current is passing, the iron is converted by induction from the wire into a magnet exactly... | |
 | James Renwick - 1840 - 412 頁
...wire, p N, of a voltaic circuit, covered with silk, to prevent metallic contact, wrapped spirally round a bar of soft iron, bent into the form of a horseshoe. While the current is passing, the iron is converted by induction from the wire into a magnet exactly... | |
 | John M. Moffat, Walter Rogers Johnson - 1842 - 498 頁
...current ? What arrangement gives the greatest facility in producing the magne tism of steel bars ? 2063 pounds, or nearly a ton. It consists of a bar...wound with twenty-six strands of copper bell-wire, covefed with cotton threads, each thirty-one feet long: about eighteen inches of the ends are left... | |
 | Richard Green Parker - 1842 - 278 頁
...subsequently constructed another, which will sustain 'Jin;:'. pounds. It consists of a bar of soil iron, bent into the form of a horse-shoe, and wound...covered with cotton threads, each thirtyone feet long i about eighteen inches of the ends are left projecting, so that only twenty-eight feet of each actually... | |
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They have subsequently constructed another, which will sustain 2063 pounds. It consists of a bar of soft iron, bent into the form of a horse-shoe, and wound with twenty-six strands of copper bell-wire, covered with cotton threads, each thirty-one feet... 
