 | Monthly literary register - 1820 - 694 σελίδες
...direction, and never to touch the other half of the needle. At the end of half an hour after the needle wns exposed to the action of the violet rays, it was carefully...minutes longer, when it was taken off and placed on its pivot, it traversed with great alacrity, and settled in the direction of the magnetical meridinn, with... | |
 | 1819 - 480 σελίδες
...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...minutes longer, when it was taken off and placed on its pivot, it traversed with great alacrity, and settled in the direction of the magnetical meridian, with... | |
 | 1819 - 482 σελίδες
...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...minutes longer, when it was taken off and placed on its pivot, it traversed with great alacrity, and settled in the direction of the magnetical meridian, with... | |
 | 1819 - 478 σελίδες
...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...operation twenty-five minutes longer, when it was taken oft' and placed on its pivot, it traversed with great alacrity, and settled in the direction of the... | |
 | 1819 - 480 σελίδες
...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...minutes longer, when it was taken off' and placed on its pivot, it traversed with great alacrity, and settled in the direction of the magnetical meridian, with... | |
 | Henry Minchin Noad - 1844 - 512 σελίδες
...and never to touch the other half of the needle. At the end of half an hour after the needle had been exposed to the action of the violet rays, it was carefully...minutes longer, when it was taken off and placed on its pivot, it traversed with great alacrity, and settled in the direction of the magnetical meridian, with... | |
 | 1846 - 602 σελίδες
...and never to touch the other half of the needle. At the end of half an hour after the needle had been exposed to the action of the violet rays, it was carefully examined, anil it had acquired neither polarity nor any force of "attraction ; but auer continuing the operation... | |
 | 1846 - 610 σελίδες
...half of the needle. At the end of half an hour after the needle had been exposed to the action of llie violet rays, it was carefully examined, and it had...neither polarity nor any force of attraction ; but aller continuing the operation twenty-five minutes longer, when it was taken off and placed on its... | |
 | Henry Minchin Noad - 1857 - 422 σελίδες
...and never to touch the other half of the needle. At the end of half-an-hour after the needle bad been exposed to the action of the violet rays, it was carefully...of attraction ; but after continuing the operation 25 minutes longer, when it was taken off and placed on its pivot, it traversed with great alacrity,... | |
 | Edwin James Houston - 1905 - 648 σελίδες
...and never to touch the other half of the needle. At the end of half an hour after the needle had been exposed to the action of the violet rays, it was carefully...minutes longer, when, it was taken off and placed on its pivot, it traversed with great alacrity, and settled in the direction of the magnetical meridian, with... | |
| |
... meridian at right angles. 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.... 