 | James Ferguson - Astronomy - 1839 - 554 pages
...given hour of the night. Bring the given star to the upper semicircle of the brass meridian, and set the index to the given hour ; then turn the globe, until the index points to XII at noon, and the upper semicircle of the meridian will then cut the sun's place,... | |
 | Charles Butler - 1846 - 222 pages
...and set the index of the Horary Circle at 12; then turn the globe till Sidney comes to the edge of the Meridian, and the index will point to the hour at that place. • TO FIND OVT THE DISTANCE BETWEEN TWO PLACES, NOT UNDER THE SAME MERIDIAN, OR THE SAME PARALLEL... | |
 | Richard Green Parker - Geography - 1855 - 136 pages
...the index of the hour-circle to that hour ; then turn the globe till the proposed place comes under the meridian, and the index will point to the hour at that place. 1087. PROBLEM 7. To rectify the globe for the latitude, zenith, and gun's place. — For the latitude... | |
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To find at what time of the year a given star will be upon the meridian, at a given hour of the night. Bring the given star to the upper semicircle of the... 
