SOLAR DYNAMICS— SOME NEW ASTRONOMY. 



319 



Win'er Solstice. 

 Vernal Equinox. 

 Summer Solstice. 



4. Autuiunal Equinox. 



5. Winter Solstice. 

 The points 1, 3, and 5 are in the plane. 



points are either above or below it. 



All other 



U, M&H.Eng'p Jt. C. 



VIII-21 



