Show i I. I Just a Few Sample Questions H nv rn JJ u ii J. Q What hal causes the gyratory meion motion motion mo mo- tion ion of or the earths earth's axis J. axis J. J S. S Whitehurst White White- h hurst u A A. The true S' S gyration of or the axis of oC the tile earth by means of or which circles 17 fi degrees decrees in diameter are described by It once in each recurring period of years called calle precession of or the equinoxes Is caused b by the attraction of or the sun stet on the equatorial protuberance ance of the lie earth This Is Ia I a ring 13 13 miles thick around the earth at atthe atthe atthe the equator and slopes toward both I poles That Is the equatorial diameter Is 18 2732 miles longer than toan the thc polar The Tho ring In latitude 4 15 45 degrees decrees is miles thick The entire band or 01 bulge contains 1 cubic miles and weighs tons The giant mass of or the Ow sun attracts this hea heavy ring with enormous force and tends to draw dla the ring Into tho the plane of or the earths earth's orbit nu But the lie poles and ring are arc inclined to tho the plane of or the tite orbit 23 33 1 2 degrees dc rees The ring would be drawn Into the plane of or the ecliptic were not the earth In rapid rotation The Tho law is called persistency of plane of or rotation or plane of motion Tho The reasons why a a. bicycle and the ring do not tumble lumbie ire are the same Tho The poles of the earth Jf If f pencils extended to a sl sky made mad of paper would each trace a circle In this vast ast period of time Go buy n n. gyroscope learn how itow note to manage the machine and you ou will know lenow all about he the ring around the earth Nuth its ics ks and can see sec sech h wh tine the poles do du u not stand up straight above the earths earthM orbital plane Tho The earth Is Just a n I peg top top that that is all The fhe moon meon attracts the ring ling and pulls puBs th the tho poles pole In and out monthly fo so o the lite pencil would make maleo a u wa wavy mark marl on the celestial vault This goes b by the name Roth Goth bodies tho the sun and the moon act with different Intensities in intensities intensities In- In on the ring for or one side Is miles nearer to them than the theother other the other the diameter of the tile earth An And these things cause all the tho trouble Lowe observatory |