 ... the sun ; so that, if we neglect the loss of heat by transmission through the glass, the temperature at the focus should be the same as that of a point placed at such a distance from the sun that the solar disc would seem just as large as the lens...  The Story of the Heavens - Síða 495eftir Robert Stawell Ball - 1885 - 551 síðurHeildartexta - Um bókina
 | 1893 - 840 síður
...neglect the loss of heat by transmission through the glass, the temperature at the focus should be the same as that of a point placed at such a distance...as the lens itself, viewed from its own focus. The most powerful lens yet constructed thus virtually transporU au object at its focus to within about... | |
 | Charles Augustus Young - 1881 - 368 síður
...neglect the loss of heat by transmission through the glass, the temperature at the focus should be the same as that of a point placed at such a distance from the sun that the solar disk would seem just as large as the lens itself viewed from its own focus. The most powerful lens... | |
 | 1881 - 898 síður
...neglect the loss of heat by transmission through, the glass, the temperature at the focus should be the same as that of a point placed at such a distance from the sun that the solar disk would seem just as large as the lens itself viewed from its own focus. The most powerful lens... | |
 | Charles Augustus Young - 1881 - 338 síður
...focus should be the same as that of a point placed at such a distance from the sun that the solar disk would seem just as large as the lens itself viewed from its own focus. The most powerful lens yet constructed thus virtually transports an object at its focus to within about... | |
 | John Michels (Journalist) - 1886 - 618 síður
...minutes they disappeared, after a journey of about thirty-six thousand miles.1' BALL (p. 495). ". . . the temperature at the focus cannot be greater, cannot...placed at such a distance from the sun that the solar disk would seem just as large as the lens itself viewed from Its own focus. The greatest burning-glass... | |
 | John Michels (Journalist) - 1886 - 638 síður
...minutes they disappeared, after a journey of about thirty-six thousand miles.1' BALL (p. 495). ". . . the temperature at the focus cannot be greater, cannot...of a point placed at such a distance from the sun tbat the solar disk would seem just as large as the lens Itself viewed from its own focus. The greatest... | |
 | John Michels (Journalist) - 1886 - 614 síður
...effect of a burning-glass Is merely equivalent to making a closer approach towards the sun. The rule la Indeed a simple one. The temperature at the focus...placed at such a distance from the sun that the solar disk would seem just as large as the lens Itself viewed from Its own focus. The greatest burning-glass... | |
 | John Michels (Journalist) - 1886 - 718 síður
...focus should be the same as that of a point placed at such a distance from the sun that the solar disk would seem just as large as the lens itself viewed from its own focus. " The most powerful lens yet constructed thus virtually transports an object at Its focus to within about... | |
 | 1892 - 656 síður
...neglect the loss of heat by transmission through the glass, the temperature at the focus should be the same as that of a point placed at such a distance...as the lens itself, viewed from its own focus. The most powerful lens yet constructed thus virtually transports an object at its focus to within about... | |
 | John Ellard Gore - 1893 - 486 síður
...neglect the loss of heat by transmission through the glass, the temperature at the focus should be the same as that of a point placed at such a distance...as the lens itself viewed from its own focus. The most powerful lens yet constructed thus virtually transports an object at its focus to within about... | |
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