Smithsonian Report, 1936. —Andrews 



Plate 2 



^,1^ ■ m 



No. I. \i)2b Jiiuury 24. 



w- 



Nu. 4. 1892 Ft.'bruarv lo. 



No. 6. IQOS October 21. 



No. o. 1920 March 2: 

 Approximate "icale. 



No. 2. 1925 December 2b'. 



i^' >' 



No. 5. 191 7 August 



No. 7. 1917 I-\'bruarv n. 

 No. IS. 1935 Decembci 2. 



British Astronomical Association. 



Types of Large sunspot Groups. 



