A graduated scale fixed to an astronomical telescope. Obsolete.
| 单词 | θ1454 |
| 释义 | the world > the universe > cosmology > science of observation > astronomical instruments > observational instruments > [noun] > telescope > part of (7) rete1665 A graduated scale fixed to an astronomical telescope. Obsolete. field lens1817 (in a telescope or microscope) the lens of a compound eyepiece which is nearest to the objective; = field glass, n. 2; contrasted with eye lens n.… hour-circle1837 A graduated circle upon an equatorial telescope, parallel to the plane of the equator, by means of which the hour-angle of a star is observed. seeker1892 An instrument used in seeking or searching. Part of an astronomical telescope; cf. searcher, n. 12, finder, n. 3b. Subcategories:— micrometer (3) |
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