48 
ARCHDEACON PRATT ON THE EFFECT OF LOCAL. 
Arc 1. 
Arc 2. 
/ c 3. 
Arc 4. 
Ai'C 5. 
Appendix. 
Calculation of the Values of E (see art. 4). 
h— cos 2a 
2 2 arc A 
, , 1*5 sinX n 
='5+ — n- COS 2a 
sin 1" X" ^ 
=•5+ Iog->^5-4905l68+ log!^+ logcos2/xj. 
2ix= 
E,= 
102° 5' 46"'6 
•5— Iog-»r5.4905l68 
I 6-6855586 
1 1-3212823 
2fj.— 
E.,= 
2/x: 
E,= 
^1-4973577J 
103° 19' 6"-6 
5_ logr-i ''5-49051681 
6-6855720 
1-3624091 
.T-5384979J 
:104° 3' 55"-7 
•5-log-‘ r5-4905l68' 
6-6855716 
r-3856669 
=0-18569. 
:0-15446. 
2/r = 
E.= 
2fi- 
E.: 
L1-5617553J =0-13545. 
105° 40' 59"-2 
5— log-1 r5-4905l68' 
'6-6855413 
T-4318788 
1-6079369J =0-09455. 
-5— log-1 r5-4905l68l 
6-6855475 
T-4907261 
L1'6667904. 
= 0-03571. 
Calculation of the V alues of A (see art. 4). 
A=Iog-i(log X— log a). 
Xi = 309 1-39 
X2=1307-90 
X3= 1380-30 
X4=4443-40 
X5 = 4010-11 
ai=313696 
a2= 132802 
a3= 139822 
a4=450045 
a5= 406463 
Ai=log-i 
'3-4901538' 
5-4965090 
>9936448. 
= 0-00985473. 
A 2 =log-' 
'3-1165745' 
5-1232046 
>9933699. 
= 0-00984850. 
