366 



Prof. P. E. Chase on the Nebular Hypothesis. 



happily adduced in explanation of some of their planetary 

 harmonies is shown (1) in the synchronism of planetary revo- 

 lution at Sun with the passage of a light-wave through the 

 major axis of the Uranus-Earth ellipse, (2) in the synchronism 

 of solar rotation with the passage of a light- wave through the 

 major axis of the modulus-atmosphere. 



The following Table represents theoretical stages of nebular 

 condensation, based upon forces which are now operating 

 within the solar system. It shows some new and interesting 

 relations between three cardinal planetary centres, viz. the 

 centre of greatest annular condensation (©), the centre of pla- 

 netary inertia (h), and the centre of incipient systemic spe- 

 cialization (^). 



r+r . 



P^-Po- 



P- 



Pact. 



B, 









f 2-667-#® a 



•000 



2 3 



2* 



2-667 r t 



J 2-637= V3®, 

 2-614 = Y 5 ^ w 

 [2-780=^-^ 



■on 



•020 

 •043 



3 3 



3 4 



13-500 ^ 



13-490= V2^ 3 



•001 



43 



41 4 



42-667 r x 



42-474= V2 f Hr 3 



005 



214-86=^ 



214-86* 



46083-4 r 



46164-7 =214-86 



•002 



2049-51 = h 3 



2049-513 



932262 r 



947511 =2M 



•016 



6453-06 = TJT 



6453 06* 



4302218 r 



4263801 =9M=[*]-^» 



•009 



In this Table r = present solar nucleal radius ; r = past 

 nucleal radius; r x = Earth's semiaxis major; p = present 

 nebular radius ; p = past nebular radius ; E = ratio of error, 

 found by dividing the difference between p and fact by p ; 

 [#] = stellar distance with parallax //# 89, which is of the 

 same order of magnitude as the distance of « Centauri. It is 

 further worthy of note, that Earth's position is a mean propor- 

 tional between the nebular radius, when Sun's nucleus reached 

 the Earth, and Sun's present surface ; that the nebular radius of 

 the Jupiter-nucleal Sun was J of -|of -|of M; that the nebular 

 radius of the Uranus-nucleal Sun was nearly 5M (4*996 M) ; 

 that the three outer nebular radii were thus in ngurate pro- 

 gression (2, 5, 9) ; and that M, when Sun was expanded to 

 the outer portions of the asteroidal belt, was coincident with 

 [*], the origin of the incipient wave-condensation of the ne- 

 bular radius of the Neptune-nucleal Sun. 



The ratio (28 : 1) which I pointed out at the close of my 

 paper on momentum and vis viva*, and the important part 

 which water plays in the armoury of our globe, suggest a 

 comparison between the liquid and the vaporous states. The 



* Phil. Mao-. October 1877. 



