Jour. Sei. Col I., Vol. XXX 1 1., Art. 7, PI. III. 



Spörer s Number of Sun spots with Different Angular 

 Velocities in Zones of Latitude 5° wide. 



13 5 13'6 13'7 13°ô 13°9 14"0 I4°l 14°2 14°3 I4!4 J4°5 14°6 14°7 I4°a ]4?9 15°0 15°1 



