DETEEMINATION OF DEFLECTION OF LIGHT BY THE SUN’S GRAVITATIONAL FIELD. 325 
Normal equations 
whence 
58/+ 3-42S/C = —1 
3-428/+ 5-218k = -62 
2-878/f = —61 
Hence deflection at the limb is 
Sk = — 21 . 
l"-75 — 0"-20 = l"-55. 
(2) Comparison with Oxford Plate Ig. 
Theoretical plate constants 
a = +4-0, Z,^d=+9-l, e=+38-8. 
Star. 
A*. 
\x. 
<1 
-30y. 
A.^x. 
<1 
Resid. 
5 
5050 
4973 
5052 
- 88 
5140 
5166 
+ 46 
4 
4732 
4493 
4547 
-562 
5109 
5127 
+ 7 
3 
4622 
4392 
4461 
-528 
4989 
5012 
-108 
6 
4635 
4329 
4326 
-750 
5076 
5075 
- 45 
10 
4764 
4426 
4409 
—816 
5225 
5219 
+ 90 
Star. 
Ay. 
\y- 
+30a;. 
E,. 
\y- 
Resid. 
5 
-6824 
-7051 
372 
-7423 
-127 
-7296 
- 15 
4 
-5751 
-6635 
520 
-7155 
+234 
-7389 
-108 
3 
-5609 
-6451 
524 
-6975 
+272 
-7247 
+ 34 
6 
-5425 
-6576 
596 
-7172 
+ 136 
-7308 
- 27 
10 
-5109 
-6371 
678 
-7049 
+ 114 
-7163 
+118 
Normal equations 
58/+ 3-428/< = +2 
3-428/ + 5-21 8k: = —24 
whence 
2-878k = -25, 
Sk = —9. 
Hence deflection at the limb is 
1 % 
l"-75 — 0"-08 = l"-67. 
2 Y 2 
