168 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1919. 
(2) Comparison with Oxford plate H,.—The reductions are simi- 
lar and are given in a rather more condensed form below. The 
theoretical plate constants are 
a—+3.8, 6,d=+8.3, e=—-+38.6. 
Star At Ait At +10y Ast At Resid 
TYSSS: 5 ISR e 7, 290 7, 182 7, 258 124 7, 134 7, 159 +235 
BEGEE oat at dceuge 6, 751 6, 680 6, 759 29 6, 730 6, 756 —168 
A aR) ea ae has 7, 126 6, 905 6,959 187 6, 772 6, 790 —134 
See Sees esta oat 7, 320 7, 108 7,177 176 7,001 7,024 +100 
OY SAA be 2 7,429 7, 147 7, 144 250 6, 894 6, 893 — 31 
Star Ay Aw —10z Aggy. Ey Ay Resid 
te eer a es 1, 586 1,095 — 14 1, 109 + 6 1, 103 +172 
Deresesueaosee see 858 642 —124 766 —127 893 — 38 
Bee secs lnseeee 1, 881 1,015 —173 1, 188 +234 954 + 23 
Doe eaen sega 1, 785 961 —175 1, 136 +272 864 — 67 
Gira Slee aan Sad 1, 909 779 —199 978 +136 842 — 89 
The normal equations are 
58f+2.833% = +1 
2.838f-+4.830% = —105 
whence 
3:238%) 25/105, 
One 220 
The corresponding deflection at the limb is 
1.75’ —0.31’’=1.44.”" 
Piate W. 
Although the exposure was only 10 seconds the images have jumped 
in right ascension, so that the appearance is dumb-bell shaped. They 
are, however, symmetrical, so that fair measures of x can be made; 
the y measures on which the result chiefly depends are unaffected. 
Star 10 is very diffused in right ascension. 
(1) Comparison with Oxford plate D,—Theoretical plate con- 
stants . : 
a=+4.9, b,d=+65, e=+39.7. 
Star. be At. Aree pi 2Ex. Aot. +91y. Ast. Ast. Resid. 
Bet PAE 12.40] 2,450] 2,370 —79,| 2,449 267] 2,182] — 2,208 + 40 
ese: bay 17.34]  3,948| 3,741 —54| 3,795] 1,704] 2,091] 2, 109 — 59 
x Ne It 17.48] 3,834] 3,634 —69.| 3,703 |. 1,602 | 2,101. . 2,124 — 44 
6.0 2t ae ee 19.87] 4,525} 4,266 +3] 4,263] 2,275] 1,988] 1,987 —181 
