| 单词 | almucantar staff |
| 释义 | > as lemmasalmucantar staff ΘΚΠ the world > the universe > cosmology > science of observation > astronomical instruments > rising and setting > [noun] astronomer's staff1551 almucantar staff1696 almucantar1880 1696 E. Harrison Idea Longitudinis iii. 12 For taking small Heights, or Distances, you may use an Almicanter Staff, for ordinary Uses. 1706 Phillips's New World of Words (new ed.) Almacantar-staff, a Mathematical Instrument usually made of Box or Pear-tree, with an Arch of 15 Degrees, to take Observations of the Sun at the times of its Rising and Setting; in order to find the Amplitude, and consequently the Variation of the Compass. 1877 G. F. Chambers Handbk. Descr. Astron. (ed. 3) 911 Almacantar Staff, an instrument formerly used for determining the amplitude of an object. < as lemmas |
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