394 



Prof. B. Stewart on 



[May 16. 



Table VI. — Venus and Mercury together (0° denotes Conjunction, in 







all 94 sets). 





Between 







o 



and 30 



+ 700 



33 



30 



60 



-171 



33 



60 



90 



-553 



33 



90 



„ 120 



-100 



33 



120 



„ 150 



+ 314 



33 



150 



„ 180 



+ 92 



33 



180 



„ 210 



- 31 



33 



210 



„ 240 



+ 107 



33 



240 



„ 270 



-301 



33 



270 



„ 300 



-814 



33 



300 



„ 330 



-218 



J> 



330 



„ 360 



+ 796 



a result which is similar to that derived from Kew, in which we have 

 manifest indications of a single, with some traces of a double, period. 



7. If we next take the period of Mercury about the sun, we obtain 

 the following result : — 



Table VII. — Period of Mercury about the Sun (in all 1 53 sets, 0° denotes 



Perihelion) . 



o 







First half. 



Second half. 



Whole series. 



and 



30 



+ 565 



-209 



+ 356 



30 „ 



60 



+ 99 



-384 



- 285 



60 „ 



90 



- 441 



-483 



- 924 



90 „ 



120 



- 897 



-442 



-1339 



120 „ 



150 



-1079 



- 64 



-1143 



150 „ 



180 



- 981 



+ 272 



- 709 



180 „ 



210 



- 646 



+ 389 



- 257 



210 „ 



240 



- 176 



+ 442 



+ 266 



240 „ 



270 



+ 369 



+ 407 



+ 776 



270 „ 



300 



+ 667 



+ 258 



+ 925 



300 „ 



330 



+ 784 



+ 165 



+ 949 



330 „ 



360 



+ 841 



+ 59 



+ 900 



We thus perceive a very considerable likeness between the results 

 derived from the two halves, while the whole is very similar to the 

 corresponding periods derived from the Kew or from the Trevandrum 

 series. 



8. Let us finally take the period of conjunction of Mercury and 

 Jupiter, and we obtain the following result: — 



