An Introduction to the Use of the Globes ... 3. Ed. Corr. and EnlBaldwin, 1816 |
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Página 28
... east , and at others westerly , scarcely any two of them agreeing at the same time ; it also hasa re- gular diurnal and annual variation . The variation of the compass is said to have been discovered by Columbus in 1492 , and was first ...
... east , and at others westerly , scarcely any two of them agreeing at the same time ; it also hasa re- gular diurnal and annual variation . The variation of the compass is said to have been discovered by Columbus in 1492 , and was first ...
Página 39
... east west before noon afternoon min . ........ minutes ......... seconds sec ... lat . ......... latitude lon . ......... longitude P. M. dec .......... declination alt .......... altitude r . ascen . right ... ascension quad ...
... east west before noon afternoon min . ........ minutes ......... seconds sec ... lat . ......... latitude lon . ......... longitude P. M. dec .......... declination alt .......... altitude r . ascen . right ... ascension quad ...
Página 40
... eastern and western hemispheres , ) which is divided into four equal parts , each containing 90 ° ; two divisions begin at the poles , and two at the equator , marked 10 , 20 , 30 , & c . on the graduated edge . † 2. The poles , two in ...
... eastern and western hemispheres , ) which is divided into four equal parts , each containing 90 ° ; two divisions begin at the poles , and two at the equator , marked 10 , 20 , 30 , & c . on the graduated edge . † 2. The poles , two in ...
Página 42
... the lower XII represents midnight ; the hours on the eastern side show the time before noon , that is , from midnight to noon ; and those on the western side , the hours from noon to midnight . The index , or hour - hand , 42.
... the lower XII represents midnight ; the hours on the eastern side show the time before noon , that is , from midnight to noon ; and those on the western side , the hours from noon to midnight . The index , or hour - hand , 42.
Página 45
... , consider London the first meri- dian , or , more accurately , Greenwich , which is five miles east of it . The Dutch , formerly Batavia , now Amsterdam ; the French , Paris , & c . horizon , in which are the poles , and passes 45.
... , consider London the first meri- dian , or , more accurately , Greenwich , which is five miles east of it . The Dutch , formerly Batavia , now Amsterdam ; the French , Paris , & c . horizon , in which are the poles , and passes 45.
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Términos y frases comunes
20th of March 21st of June analemma Answer Argo Navis Aries Armillary Sphere brass meridian Bring the given bring the sun's Canis Major Canis Minor Cape Cape Frio centre climate compass constellations diameter difference of latitude distance sailed diurnal motion divide earth eastern verge ecliptic English miles equal equator equinoctial fix the quadrant given day given latitude Given London given place graduated edge hemisphere horizon hour hour-circle index points index will point latitude and longitude length Lizard Point longest day longitude mark meri meridian altitude midnight month moon moon's noon number of degrees oblique ascension orbit parallels of latitude pass planets polar circles PROBLEM quadrant of altitude reckoned Rectify the globe required the place Required the sun's right angles right ascension rising and setting round set the index ship sails side south point stars sun rises sun's place swer turn the globe upper XII vertical
Pasajes populares
Página 11 - Things which are halves of the same are equal to one another. 8. Magnitudes which coincide with one another, that is, which exactly fill the same space, are equal to one another. 9. The whole is greater than its part. 10.
Página 140 - On the plate is represented a total lunar eclipse ; the moon being in the midst of the earth's shadow. Now it will be apparent that in the situation of the sun, earth, and moon, as represented in the figure, this eclipse will be visible from all parts of that hemisphere of the earth which is next the moon, and that the moon's disk will be equally obscured, from whatever point it is seen.
Página 11 - Things which are equal to the same thing are equal to one another. 2. If equals be added to equals the wholes are equal. 3. If equals be taken from equals the remainders are equal. 4. If equals be added to unequals the wholes are unequal. 5. If equals be taken from unequals the remainders are unequal. 6. Things which are double of the same are equal to one another.
Página 107 - ANGLE OF POSITION between two places on the terrestrial globe, is an angle at the zenith of one of the places, formed by the meridian of that place, and a vertical circle passing through the other place...
Página 10 - Again ; the mathematical postulate, that " things which are equal to the same are equal to one another," is similar to the form of the syllogism in logic, which unites things agreeing in the middle term.
Página 66 - ... bring the given place to the meridian, and set the index to the given hour. Turn the globe till the index points to...
Página 128 - Sun's centre, which is 49,000 miles, is within less thin a third part of the Sun's semi-diameter from his surface. In that part of its orbit which is nearest the Sun, it flies...
Página 47 - PERKECI are those who live in the same latitude, but in opposite longitudes ; when it is noon with the one, it is midnight with the other; they have the same length of days, and the same seasons of the year. The inhabitants of the poles can have no Perioeci.
Página 69 - Rectify the globe for the latitude of the place. Bring the sun's place in the ecliptic to the meridian, and set the index at 12.
Página 140 - ... small portion of the hemisphere on which the moon's shadow falls, it happens that for any particular place on the earth, lunar eclipses are more frequently...