Chase.J 572 fjan. 19, 



231), and in Note 156. A connection in whicli the liarmonies of luminous 

 undulation are more directly shown, gives the following relations: 



W; : TO3 : : /^ : ^/^ 

 p-,^ : p^ : : \ year : 1 day 

 m-j : m^ : : p., : a-j 

 Stockwell's estimates of p^ and a-, (secular perihelion and secular 

 aphelion of Uranus) are 17.687929 and 20.679283. The closeness of 

 harmonic accordance is shown in the following comparison, in which 

 I have used Struve's constant of aberration and the estimates of Note 

 313. 



Velocity of light .43073r„ .43077?',, Struve. 



Semi-axis major of Uranus 19.184^3 19.138^, Stockwell 



Sun -f- Uranus 22592 22600 =h 100 Newcomb. 



" " Neptune 19324 19380 i 70 Newcomb. 



The division of the outer planetary belt is, therefore, such that the 

 aphelion mass is in accordance with aphelion influence at the inner portion 

 of the belt, while the perihelion mass is in accordance with perihelion 

 influence. The farther considerations of Note 156 add to the interest of 

 this relationship. 



316. Joint Relations of Sun, Earth, Vemis and Moon. 



The three foregoing notes seem to show that the harmonic influence of 

 the chief centre of condensation (Earth) upon planetary masses, has been 

 greater than that of the centre of nebulosity (Jupiter). We may, there- 

 fore, naturally look for additional illustrations of terrestrial influence with- 

 in the dense belt, such as are given in Notes 8, 85, 156, 246-7, 254-6, 313. 

 The estimate of p., in Note 246, would become 1 -^ 81.08 if we adopt the 

 value of ^3, which is given in Note 313. This value, if substituted in Note 

 8, would give 4.952 miles for the height of Earth's homogeneous atmos- 

 phere, through the proportion 



;:'' X 81.08 : 1 : : rj : .0012496;'3 : : 3962.8 : 4.952 



The harmonies of Note 85 may well be studied in this connection. 

 Stockwell's value for the secular perigee of Venus is . 9322648^)3 —.7744234^^ 

 = .1578414 p. = 14,625,840 miles = 1.0252 X (3 X 4 X 5) « x 3962.8 

 miles. The solar modulus of light, according to the same estimates, is 

 2213.37/,3 — 1.00073 X 4 x (3 x 4 x S)*;-^. 



317. The, November Meteors. 



The relations which were pointed out in Note 315 inay be supplemented 

 by cometary indications of a character somewhat like those which led 

 Forbes to his deduction of two supra-Neptunian loci (Notes 32, 305). The 



