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" The focus of violet rays was carried slowly along the needle, proceeding from the centre towards one of the extremities, care being taken never to go back in the same direction, and never to touch the other half of the needle. At... "
Electricity in Every-day Life ... - Страница 323
написао/ла Edwin James Houston - 1905
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The Monthly magazine, Том 49

Monthly literary register - 1820 - 694 страница
...possess neither popularity nor any power of aitracting iron filings. It was fixed horizontally upon support by means of wax, and in such a direction as...meridian at right angles. The focus of violet rays wns carried slowly along the needle, proceeding from the centre towards one of the extremities, care...
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Blackwood's Magazine, Том 3

1818 - 762 страница
...possess no polarity, and not to exhibit any attraction for iron filings. It was fixed horizontally on the support by means of wax, and in such a direction as to cut the magnetic meridian nearly at right angles. By a lens of a sufficient size, the whole of the violet ray was collected into...
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Annals of Philosophy: Or, Magazine of Chemistry, Mineralogy ..., Том 11

1818 - 514 страница
...no polarity, and not to exhibit any attraction for iron filings. It was fixed horizontally «n the support by means of wax, and in such a direction as to cut the magnetic meridian nearly at right angles. By a lens of a sufficient size, the whole of the violet ray was collected into...
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Blackwood's Edinburgh Magazine, Том 3

1818 - 806 страница
...possess no polarity, and not to exhibit any attraction for iron filings. It was fixed horizontally on the support by means of wax, and in such a direction as to cut the magnetic meridian nearly at right angles. By a lens of a sufficient size, the whole of the violet ray was collected into...
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The Edinburgh Philosophical Journal, Том 1

1819 - 482 страница
...prism, and was collected into a focus by a lens of a sufficient size. The needle was made of soft iron, and was found, upon trial, to possess neither polarity...slowly along the needle, proceeding from the centre towards one of the extremities, care being taken never to go back in the same direction, and never...
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The Edinburgh Philosophical Journal, Том 1

1819 - 480 страница
...prism, and was collected into a focus by a lens of a sufficient size. The needle was made of soft iron, and was found, upon trial, to possess neither polarity...slowly along the needle, proceeding from the centre towards one of the extremities, care being taken never to go back in the same direction, and never...
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The Edinburgh Philosophical Journal, Том 1

1819 - 480 страница
...prism, and was collected into a focus by a lens of a sufficient sine. The needle was made of soft iron, and was found, upon trial, to possess neither polarity nor any power of attracting iron tilings. It was fixed horizontally upon a support by means of wax, and in such a direction as to cut...
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The Edinburgh Journal of Science, Том 4

1826 - 412 страница
...means of a common prism, and was collected into a focus by a lens of a sufficient size. The needle was made of soft wire, and was found, upon trial,...slowly along the needle, proceeding from the centre towards one of the extremities, care being taken never to go back in the same direction, and never...
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An Experimental Treatise on Optics: Comprehending the Leading ..., Том 3

1826 - 406 страница
...of a common prism, and was collected into a focus by a lens of a suffiOpt. 44 cient size. The needle was made of soft wire, and was found, upon trial,...slowly along the needle, proceeding from the centre towards one of the extremities, care being taken never to go back in the same direction, and never...
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The London encyclopaedia, or, Universal dictionary of science ..., Део 2,Том 13

Thomas Curtis (of Grove house sch, Islington) - 440 страница
...means of a common prism, and was collected into a focus by a lens of a sufficient size. The needle was made of soft wire, and was found, upon trial,...slowly along the needle, proceeding from the centre towards one of the extremities, care being taken never to go back in the same direction, and never...
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