196 



MR. JOSEPH BAXENDELL ON 



investigation of the differences of velocity of rotation said 

 to be due to differences of latitude of the spots. 



The following tables contain the corrected Greenwich 

 mean times of the observed meridional conjunctions of the 

 spots A, B, C, E and ¥, with the centre of the planet's 

 disc : 







Spot A. 







1858. 







1859. 







Nov. 7 



30 



40-0 



Jan. 18 



10 



33'o 



17 



9 



3-8 



19 



6 



i4'6 



Dec. 2 



6 



34'2 



22 



13 



44'5 



4 



8 



14-0 



23 



9 



38-6 



20 



II 



24-9 



28 



8 



47-5 



23 



8 



53"i 



Feb. 2 



■7 



55' 5 



1859. 







7 



7 



9'5 



Jan. I 



II 



23"5 



II 



10 



21-5 



7 



6 



25 '4 



Mar. 10 



7 



49-6 



12 



5 



31-6 













E 











1858. 







1859. 









Dec. 20 



10 



33'i 



Jan. 28 



7 



54-7 





23 



7 



58-9 



Feb. 2 



7 



5'2 





1859. 







6 



10 



19-4 





Jan. I 



10 



27-0 



7 



6 



17-1 





14 



6 



20*9 



9 



7 



49"7 





16 



7 



57-6 



II 



9 



27-4 





18 



9 



32-6 



Mar. 10 



6 



51-6 





22 



12 



50°2 



29 



7 



27-1 





23 



8 



42.8 



31 



9 



11-4 











^"" 















0. 







1859. 









1859. 







Jan. 22 



7 



46-3 





Feb. 27 



7 



33-8 



37 



6 



56-2 





Mar. 13 



9 



3-9 



Feb. 10 



S 



37-2 



















E. 









1859. 









1859. 









Jan. 23 



6 



27'3 





Mar, 7 



6 



55-5 





Feb. 6 



8 



2.6 





Apr. 7 



7 



26-9 





II 



7 



4"9 





9 



9 



1*2 





23 



7 



4" 7 





21 



9 



1-8 











I 











1858. 









1859. 









Nov. 12 



II 



44-2 





Feb. 2 



9 



15-9 





1859. 









5 



6 



47-5 





Jan. 28 



10 



l6-2 





10 



6 



3-1 



