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Reversing Prism |
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Reversing Prism
an image-erecting Dove prism that is sometimes mounted ahead of the ocular of a transit, making it possible to observe the motion of stars in one direction at any point on the meridian. This reduces personal error on the part of the observer. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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