Vol. VIII, No. 6.] Note on the Secular Cooling of the Earth. 
] 
where 2%, Yo; 2) i8 the pole: 
r +a d” sinh (wu) : 
= ia 3 Paar tt - + Yn(® Yo%) - o. ye - (2u) 
For, (J being a Bessel’s function) 
(4) 
me an “) 
/ 7 Seer 5m U 
(2u) a 

d sinwu\ . (2 3 ‘ 
err ( u )=*. =) J n+ 
si “ldap 
go * = J e adw.[p =cos 6] 
(sae ae —) 
OP a ( =)= J's Piss \s - 
and 

1 * 
_f Pilid © On: 
a: | 
= 28 ( FY? Inat 
a e u 



= 2, (250)". 
(dy 
Changing w into 7, 
l — pu dn (= iu 
oo, rau € du = 2. iu ; (2u)*, 
2 (du*)" 
4 ss sin h “) 
et ee Oe). 
(du*)" 
Suppose now 
— = fy 
é x cos 6 = 2 An Pale) 
l ra 
ane B y 
fe Pym du=Ay] Pow) dn 
ee a 

2 d* sin A (u) = 
(du?)" ieyidias 2n 
A, h _ ra 
iy Sia Sy 
