Octante. Octante. 90º arc wood frame formed by two radios with an opening of 90º, that is, an eighth of the circle. On the vertex an alidada that reaches the graduate arc is supported and slides over it longitudinally. On one of the radios and on top of the vertex where the alidada is screwed, the mirrors are found to bring the sun. On the edge of the alidada carries a nonius for fast reading. He belonged to the Baduino King of Belgium. Reflection instrument, used to measure the height of the stars in order to deduce the latitude of the place. It was devised by Hadley in 1731, allows measuring
Octante. Octante. 90º arc wood frame formed by two radios with an opening of 90º, that is, an eighth of the circle. On the vertex an alidada that reaches the graduate arc is supported and slides over it longitudinally. On one of the radios and on top of the vertex where the alidada is screwed, the mirrors are found to bring the sun. On the edge of the alidada carries a nonius for fast reading. He belonged to the Baduino King of Belgium. Reflection instrument, used to measure the height of the stars in order to deduce the latitude of the place. It was devised by Hadley in 1731, allows measuring angles of up to 90 degrees. It is the antecedent of the : Astronomical instruments/latitude inscriptions - Transcription: "Made by James Chapman St cattherines*/*London for Jonh Long 1783*. Registration - Location: Location:
Size: 1401px × 1784px
Photo credit: © EU/BT / Alamy / Afripics
License: Licensed
Model Released: No
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