99 Ritiieebictian of Kirkwood’s Analogy. 
D=r,+r'= Kirkwood’s diameter of ape third planets 
sphere of attraction. 
e—e= 
From these definitions the value of D is thus derived: _ 
r,,7 r,? 
m wl m 
pia” pll2 
1,=a—-a,-T7, 
7’ =a'—a-—r' 
m mM, 
r,? (a—a,—7T,) 
m m/ 
r/2 (a’—a-?r’) 
r,f/ m,=(4a —a,—T7,)f/m 
rf m'=(a’—a-— r’)/m 
ravm( See) 
/M+-/mM, 
~@ 
is «(Geral 
D=(r,+r’) 
a—a, a’-a 
— "(Fmt Vm, + Taree 
-(3) Gi)"* 
aa , 
»— (=) (5) id oo Secs) | 
va (%)! (Lever ee) | 
PR Aan! 
, b, 
& as 
vam, (Tapia) 
YE Gare ra) 
