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Page xii - From the sum (increased if necessary by 24 hours) subtract the right ascension of the body : the remainder (diminished by 24 hours if greater than 24 hours) will be the hour angle of the.
Page x - Bearing Amplitude of the Sun " is meant the arc of the horizon intercepted between the east point and the point where the sun rises, or between the west point and the point where it sets. By the " Time Amplitude of the Sun " is meant the time he rises before or after 6 AM, or sets after or before 6...
Page x - Rising and Setting of the Sun. — By the bearing amplitude of the sun is meant the arc of the horizon intercepted between the east point and the point where the sun rises, or between the west point and the point where it sets. It is reckoned from the east and west points towards the north or south, according as the declination is north or south. By the time amplitude is meant the time the sun rises before or after EXPLANATION AND USE OK TABLES.
Page xi - ... converted into time, shows how long it is after 6 o'clock before the sun rises, and how long before 6h the sun sets. The longest night and shortest day, therefore, become equal respectively to the longest day and shortest night, as before found. It will be perceived from what is above shown, that when the latitude and declination are both north or both south, the sun rises before and sets after 6 o'clock ; but when one is north and the other south, the sun rises after and sets before 6. 89. We...
Page x - Parts.— At the Equator a degree of longitude is equal to a degree of latitude ; but as we approach the poles, while...
Page iv - ... is nearer to the moon than if he were at the centre. Consequently the apparent semidiameter is something greater than what is taken out of the Nautical Almanac.