Fig. 14. Head of the 75-FOOT Spectograph of the 150-FOOT Tower Telescope. 



Fig. 15. The curve represents the theoretical variation of the displacements 

 of spectrum lines with the heliographic latitude. The sun is assumed to be a 

 magnetized sphere with its magnetic poles coinciding with the poles of rotation. 

 The points represent mean values of the observed displacements. Vertical 

 scale: 1 square = 0.001 mm. 1=0.0002 Angstrom. 



