An easy introduction to geography and the use of the globes1812 |
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Σελίδα 19
Adam Walker. into the zenith , by elevating the pole to the latitude of it , then fix on the slender brass plate , called the quadrant of altitude ... meridian north and south , observing to give the needle at London 24 ° westerly variation ...
Adam Walker. into the zenith , by elevating the pole to the latitude of it , then fix on the slender brass plate , called the quadrant of altitude ... meridian north and south , observing to give the needle at London 24 ° westerly variation ...
Σελίδα 31
... meridian , fix the quadrant of altitude right over it , and lay its edge over the other place , then turn the quadrant round on its center , and ob- serve all the places that pass under the same division .... Example . How far is it ...
... meridian , fix the quadrant of altitude right over it , and lay its edge over the other place , then turn the quadrant round on its center , and ob- serve all the places that pass under the same division .... Example . How far is it ...
Σελίδα 33
... meridian , then slide the meridian , till the place is 18 ° beneath the horizon , or even with the wires ; then observe the elevation of the op- posite pole , and that gives the sun's declina- tion . ( See Prob . XII . ) Then the two ...
... meridian , then slide the meridian , till the place is 18 ° beneath the horizon , or even with the wires ; then observe the elevation of the op- posite pole , and that gives the sun's declina- tion . ( See Prob . XII . ) Then the two ...
Σελίδα 35
... meridian as are equal to half the length of the day given , that place ... Altitude of the Sun at Twelve o'clvek at Night , at any Place in the Frigid ... altitude of the sun to the people [ 95 ]
... meridian as are equal to half the length of the day given , that place ... Altitude of the Sun at Twelve o'clvek at Night , at any Place in the Frigid ... altitude of the sun to the people [ 95 ]
Σελίδα 38
... distance from the equator north or south in degrees and minutes . 2d . Latitude of ... meridian cuts the ecliptic from the first point of Aries . 4th , Right as ... Altitude , is the height of the sun , or star , above the nearest part of ...
... distance from the equator north or south in degrees and minutes . 2d . Latitude of ... meridian cuts the ecliptic from the first point of Aries . 4th , Right as ... Altitude , is the height of the sun , or star , above the nearest part of ...
Άλλες εκδόσεις - Προβολή όλων
An Easy Introduction to Geography and Use of the Globes: By A. Walker ... Adam Walker Πλήρης προβολή - 1791 |
An Easy Introduction to Geography and the Use of the Globes Adam Walker Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
Συχνά εμφανιζόμενοι όροι και φράσεις
21st June Arcturus axis brass meridian brazen meridian bring the place called Cancer CELESTIAL GLOBE circle compass countries day and night day or night degrees of latitude distance Dog star double line earth east eastern longitude ecliptic equator equinoctial Example Example.-What find the Latitude find the sun's fix the quadrant fixed stars Frigid Zone Gemini given place heavens hemisphere horizon hour incloses Jamaica Jupiter land Latitude and Longitude length longest day Longitude given meri meridian altitude moon moon's orbit North Cape north or south north pole November o'clock parallel Paris perpetual apparition Petersburgh planets point of Aries PROBLEM XVII quadrant of altitude rectifying the globe ridian right ascension rizon Rule Rule.-Rectify situated sun pass vertically sun rise sun vertical sun's altitude sun's declination sun's place titude Tropic of Cancer Tropic of Capricorn turn the globe twelve at night Ursa Major winds would carry zenith zodiac
Δημοφιλή αποσπάσματα
Σελίδα 6 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees; and each degree into 60 minutes, each minute into 60 seconds, and so on.
Σελίδα 7 - The space between the Tropic of Cancer and the Arctic Circle is called the North Temperate Zone, and that between the Tropic of Capricorn and the Antarctic Circle is the South Temperate Zone.
Σελίδα 7 - ... with the sea or ocean. If a gulf be very large, it is called an inland sea ; as the Mediterranean : if it do not go...
Σελίδα 39 - PROBLEM III. — To find the declination of the sun or stars. Rule. — Bring the sun or star to the brazen meridian ; and then its distance in degrees from the equator is its declination. Ex. — Thus, the sun's declination, April 19, is 11° 19
Σελίδα 10 - ... that young people were confounded when they compared it with the earth's positions during its annual rotation round that luminary, and considering the horizon as the boundary of day and night. Being, therefore, sometimes obliged to rectify for the place on the earth, and sometimes for the sun's place in the ecliptic, the two rules clash so unhappily in the pupil's mind, that few remember a single problem a twelvemonth after the end of their tuition.
Σελίδα 41 - Fix the quadrant of altitude, as in the last problem, letting it cut the longitude given on the ecliptic ; then seek the latitude on the quadrant, and the place under it is the place sought. Ex. — Thus, if I am asked what part of the heavens that is, whose longitude is 60° 30', and latitude 5° 30' south, I find it is the place which Aldebaran occupies.
Σελίδα 41 - To find any place in the heavens by having its latitude and longitude given. Rule. — Fix the quadrant of altitude, as in the last problem, letting it cut the longitude given on the ecliptic ; then seek the latitude on the quadrant, and the place under it is the place sought. Ex. — Thus, if I am asked what part of the heavens that is, whose longitude is 60° 30', and latitude 5° 30...
Σελίδα 29 - Make the elevation of the pole equal to the latitude of the place ; find the sun's place in the ecliptic, bring it to the meridian, and set the index to 12.
Σελίδα 10 - Ike earth, instead of the sun's place in tha ecliptic; which put the globe into so unnatural and absurd .a position, respecting the sun, that young people were confounded when they compared it with the earth's positions during its annual rotation round that luminary, and considering the horizon as the boundary of day and night. Being, therefore, sometimes obliged to rectify for the place on the earth, and sometimes for the sun's place in the ecliptic, the two rules clash so unhappily in the pupil's...
Σελίδα 9 - Simplicity and perspicuity should ever he studied by those who cultivate the young mind : and jarring, opposing, or equivocal ideas "should be avoided almost as much as error or falsehood. Our globes, till of late years, were equipt with an hour circle, which prevented the poles from sliding through the horizon ; hence their rectification was generally for the place on...