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altitude angle Answer appears Aries Astronomy bearing begins brass meridian bring bring the sun's called Cape celestial centre circle climate Clock coincide comes compass constellations contains course December declination diameter difference distance divide earth east eastern ecliptic edge ends English equal equator four given day Given London given place half hemisphere horizon hour island June latitude latitude and longitude length less likewise longest day longitude mark meridian midnight miles minutes month moon morning motion nearly night noon number of degrees o'clock objects oblique observe opposite orbit parallel pass past planet pole position PROBLEM quadrant reckoned Rectify the globe represent right ascension rising rising and setting round September set the index shadow side signs situated Solution stars sun's place suppose taken turn the globe twelve upper XII verge vertical zone
Page 9 - 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.
Page 138 - 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.
Page 9 - 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.
Page 105 - 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...
Page 8 - 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.
Page 64 - ... bring the given place to the meridian, and set the index to the given hour. Turn the globe till the index points to...
Page 126 - 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...
Page 45 - 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.
Page 67 - 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.