he next thing much upon each other; and to continue the instance plane of the earth’s equator. The polar axis is re- was to raise the huge iron support for the polar axis in just mentioned, the accurate measurement of the solar position and bolt it home. This was accomplished with constant, most… … the whole length of the building. When observe it for movement. This was a tire- the telescope is to be used, this roof will some, tedious, and not particularly relia- be slid off its permanent position back ble operation. Now the astronomer turns over the roof of the second room, thus his heavenly…
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