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altitude angle Answer appears apply Aries Astronomy bears begins bring bring the sun's called Cape celestial centre circle climate Clock coincide compass contains course December declination describe diameter difference distance divide draw earth east ecliptic edge ends English equal equator extend four geographical 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 Note number of degrees o'clock objects oblique observe opposite orbit parallel pass past planets polar pole position PROBLEM quadrant reckoned Rectify the globe represent right ascension rising round sailed set the index ship side signs situated Solution sphere stars sun's place suppose taken turn the globe upper XII vertical
Σελίδα 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.
Σελίδα 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.
Σελίδα 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.
Σελίδα 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...
Σελίδα 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.
Σελίδα 66 - ... bring the given place to the meridian, and set the index to the given hour. Turn the globe till the index points to...
Σελίδα 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...
Σελίδα 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.
Σελίδα 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.