1015 
Pio dio | Px 920 P30 930 Po 740 
le) jee 5 | fe) o En gi o ; | le) le) 
1907 +0.0163-+0.0116 | —0.45140.1303 | —0.0073—0.1175 | +0.2032-0. 3009 
[1908 | + 0132— 0097 | — 4104+ 2213 | — 0160— 194 |+ 2054+ 2954 
nao — 0058— 0203 | —- 3522+ 3045 | — 0245— 1201 + 2083} - 2938 
The differences between the observations and the theory are thus : 
| Afi AN AP: A92 | APs A43 | Af4 Ada | 
[1908 + 162+ 2) + 1744 47)+ 32+ 10/- 38+ 16 
0G. 47]. 108 OE 103 == 1 334 24 | — 123+ 119 
For the sake of comparison I add the differences with SAMPSON’s 
theory expressed in the same units. It will be seen that, with a 
few exceptions, the Ap: and Ag; are smaller than the Ap;' and Ag;'. 
| apr’ Aq Apz'! AQ AP3 ‘93 
(eo) © fe} o | fo} fo} | le} o | 
1907 | +0.0274—0.0109 | —0.0106—0.0341 | —0.0034—0.0124 | —0.0182++0.0266 | 
| | 
1908 | +- 81— 38°) — Oli 348 — 172—. 147 a 1684 216, 
1909 | — 9— 250 | — 386— 265 | — 218— 153 | — 212+ 234 | 
| | 
The mean errors, expressed in the same unit, are 
7 | 
| 
| py and q | po and q% | Pz and q3 | Pa and q4 
md En = all ——— ————— — 
1907 _ | + 0.0095 +0.0060 + 0.0040 | + 0.0027 | 
| | | | 
| 1908andi909] + 73 | + 46 | + 2 | +4 117 
| | 
From the residuals Ap; and Ag; I have derived the quantities 
Aw; and Ay, which I also used in my discussion of the Cape 
observations’), by the formulas 
Ag; = Sa'yAp; 
J 
CNT 20,44; ’ 
J 
1) Annals of the Cape Observatory, Volume XII, Parts 3 and 5. 
