45 
unde patebit primum adeo refractionis terminum ad tem- 
peraturam glaciei liquantis ex hac hypothesi fatorum 
= 210l".ll = 3 1 1 1 
§• 28. 
Quod ad secundum attinet terminum, erit ille 
r {ccMl* — (3Mt 6 ) dt p Adt f p B dt p 
J 2 ~j i 4 -mi 2 1 + nt z (Ï 
i:t z y 
■/ 
Ddt 
(1 -}- nt z y 
Ct 
A K 
— - — Are. Tang;. tV m - — — Are. Tang;, t V' n -i . r 
K»î K/z 2(1 + n* 3 ) 
C Dt 
-p — Are. Tang. tvn-\- 
'2vn 
4(1 -\-nt z ) : 
3 Dt 3D 
Hh _L Are. Tang, ty'n , 
8(1+ ni 2 ) ^ %Vn 0 
A /mx (4 C -f- 3D) 
^ — v - Are. Tang. ■ 
m 
-u — - — - . y' hx 
h 8(/z — j— u X ) 
4- 
83- f- 4C-P 3D 
81 ^ n 
Arc. Tan 
g- y 
nx 
h 
+ 
Dh y'hx 
4 (h -f- h .y) 2 ? 
ideoque, cum pro universa quidem atmospliæra sumen- 
dum sit .r r= h , fiet adeo hæc altera pars refractionis 
astronomicæ horizontalis 
