1872.] on Planetary Influence upon Solar Activity, 217 



Table V. 



Longi- 

 tude. 



Yen us 

 (whole series). 



Yenus 

 (Carrington's series). 



Yenus 

 (Kew series). 



Mercury 

 (whole series). 



o 



-49 

 -35 



— 21 



- 7 

 + 7 

 +21 

 +35 

 +49 



(A) (B) (C) (D) 

 +40+48-18-118 

 +21+46-20- 82 

 _ 3+39-13- 43 

 -31+17+15- 3 

 -50-14+49+ 29 

 -46-40+60+ 53 

 -25-50+34+ 76 

 + 7-50-22+105 



(A) (B) (C) (D) 

 + 8+30-10-160 

 + 9+24- 5- 95 

 + 1+24+10- 37 

 -12+16+36+ 16 

 _23+ 2+53+ 58 

 -15-20+46+ 82 

 + 4-45+13+100 

 +14-50-40+118 



(A) (B) (C) (D) 

 + 117+58-27-46 

 + 47+58-39-59 



- 16+45-38-52 

 _ 74+13- 9-36 

 -113-29+45-20 

 _] 19-57+77+ 4 

 _ 91-56+59+36 



- 9-44+ 1+82 



(A) (B) (C) (D) 

 +28+45-50-12 

 +21+ 6- 6-26 

 _ 6-12+36-34 

 -33-16+60-28 

 -40-18+63- 9 

 -28-20+43+19 

 — 1-28+ 7+36 

 + 19-27-27+32 



The results of this Table are exhibited graphically in the Plate which 

 accompanies this paper. 



11. If we now refer to the Table for Jupiter, we find that we cannot 

 detect the same kind of behaviour that we did in the case of Venus and 

 Mercury. We cannot say that such a behaviour does not exist with refer- 

 ence to this planet ; but, if it does, it is to such an extent that the obser- 

 vations at our disposal have not enabled us to detect it. 



12. The following evidence from a different point of view goes to con- 

 firm the results we have now obtained. "VYe might expect, if there really is 

 a behaviour of sun-spots depending upon the position of Venus, and of the 

 nature herein stated, that the average area of a spot as it passes the central 

 longitude of the disk ought to be greatest when Venus is 180° from the 

 earth, and least when Venus and the Earth are together, and the same 

 ought to hold for Mercury and for Jupiter, if these planets have any in- 

 fluence. Taking the mean of the four central areas as giving the best 

 value of the area of a spot as it passes the centre, we have for Venus the 

 following results :— 



Mean of four central areas — 



(A) (B) (C) (D) 

 44741 57426 46068 33095 



and the number of groups for these are as follows : — 

 229 265 150 181 

 hence the mean area of one group will be — 



195 217 307 183 

 from which we get (A)=195 ; mean of (B) and (D) = 200 ; (C) = 307 ; 

 that is to say, A is least, and C is greatest. 

 Doing the same in the case of Mercury, we get 



(A) = 204; mean of (B) and (D) = 217; (C) = 246 ; 

 and finally, doing the same in the case of Jupiter, we get 



(A)= 185 ; mean of (B) and (D) = 207 ; (C) = 282 : 

 it thus appears that in all these cases the same order is preserved. 



13. We leave it to others to remark upon the nature and strength of the 



