no 



KNOWLEDG1 



s 



April, 1915. 



w 



N 

 FIGURE 91. 1915, February 25d. 12h. 14.5m. 



W 



FIGURE 92. 1915, February 26d. llh. 41m. 



A ( iroup of Sun Spots. 

 From photographs kindly lent by the Astronomer Royal. 



