 | James Atkinson - Navigation - 1765 - 504 pages
...Find the Sun's Right Afcenfion by Problem 3. and the Afcenfional Difference by Problem 4. Then, 2. When the Latitude and Declination are both North, or both South, the Afcenfional Difference added to, and fubtracted from the Sun's Right Afcenfion, the firft is the Oblique... | |
 | James Atkinson - Navigation - 1770 - 514 pages
...added to, and fubtra&ed from 6 Hours, the one is Sun-rifing, and the other .is Sun-fetting. Note ; When the Latitude and Declination are both North or both South, the S un rifeth before, and fets after Six. But if one be North, and the other South, he then rifcth after,... | |
 | Andrew Wakely - Compass - 1780 - 350 pages
...added to, and fubftra&ed from 6 Hours, the one is Sunrifing, and the other Sun-fetting. Nate 2. If the Latitude and Declination are both North or both South, the Sun rifeth before, and fets after Six of the Clock ; but if one be North, and the other South, the contrary.... | |
 | John Farrar - Logarithms - 1822 - 244 pages
...of declination rs 23° 27' 57" south of EQ, we shall have J3© V equal to AQ T ; and TB, equal VA, converted into time, shows how long it is after 6...rises after and sets before 6. 89. We have seen that um and rs represent the apparent path of the sun, when at its greatest declination north and south,... | |
 | John Hubbard Wilkins - Astronomy - 1822 - 158 pages
...there are others which may be practised if necessaiy. It may be useful to subjoin the following rule. When the latitude and declination are both north or both south, the declination must be subtracted from the sun's meridian altitude ; but if one be north and tht other... | |
 | John Hubbard Wilkins - Astronomy - 1832 - 196 pages
...there are others which may be practised if necessary. It may be useful to subjoin the following rule. When the latitude and declination. are both north or both south, the declination must be subtracted from the sun's meridian altitude ; but if (me be north and the other... | |
 | John Farrar - Trigonometry - 1833 - 274 pages
...declination rs 23° 27' 57" south of EQ, we shall have BQ°f equal to AQ T ; and °fB, equal °PA, converted into time, shows how long it is after 6...after and sets before 6. 89. We have seen that nm and r 3 represent the apparent path of the sun, when at its greatest declination north and south, and that... | |
 | John Farrar - Trigonometry - 1833 - 276 pages
.... l°f = log. tang JVTO + log. . lat 42° 23' 28" declin 23° 27' 57" . tang^Q, 9,96040 . 9,63.759 It will be perceived from what is above shown, that...its greatest declination north and south, and that m 0 measures the time from midnight to sunrise, or half the night, and r Q the time from sunrise to noon,... | |
 | John Farrar - Logarithms - 1840 - 270 pages
...converted into time, shows how long it is after 6 o'clock before the sun rises, and how long before 6" the sun sets. The longest night and shortest day,...or both south, the sun rises before and sets after six o'clock ; but when one is north and the other south, the sun rises after and sets before 6. 89.... | |
 | James Inman - 1849 - 508 pages
...the sun rises before or after EXPLANATION AND USE OK TABLES. XI 6 AM, or sets before or after 6 PM When the latitude and declination are both north or both south, the sun rises so much before 6 AM, and sets so much after 6 PM When the latitude and declination are ote north and... | |
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... 28". 88. Moreover, if we draw the parallel of declination rs 23° 27' 57" south of EQ, we shall have BQ°f equal to AQ T ; and °fB, equal °PA, converted into time, shows how long it is after 6 o'clock before the sun rises, and how long before 6h... 