162 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1919. 
TABLE XI.—Check plates, measures. 
Approximate 
coordinates. ee! wi—by S2—Cy ™—d M1—e) 
Star. —— ee ee ee eee ee 
« y At. | Ay, | At. | Ay. | At. | Ay. | Az | Ay At | Ay 
Fees Se 1.41 | 20.31 | 4,346 | 7,180 | 3,199 | 4, 259 | 6,012 | 7,375 | 3,921 | 8,796 | 5,435 | 4,399 
mye COLT BE 5.89 | 12.74 | 3,865 | 6,405 | 3,394 | 4,129 | 4,922 | 6,132 | 3,039 | 7,440 | 5,978 | 4,170 
Ande orogd 9.46 | 11.13 | 3,640 | 5,932 | 3,408 | 4,118 | 4,369 | 5,366 | 2,638 | 6,776 | 5,966 | 4,441 
fee Rea eile 12.00,|, 6.84,| 3)312"| 5,590.|...---<|--.-22- 3, 831 | 4,752 | 1,938 | 6,156 |....... 4,314 
‘etrall agen: 12.80 | 27.33 | 5,415 | 6,561 | 3,192 | 5,140 | 7,689 | 5,925 | 5,379 | 7,580 | 5,032] 5,794 
PU CES 13.75 | 13.78 | 4,076 | 5,630 | 3,496 | 4,290 | 4,801 | 4,805 | 3,101 | 6,461 | 5,906 | 4, 826 
gidi ape. 4 15650 ia. 38°t 60254 6, 3004... fl ectba aolater Pho odon al. 5,139 | 5,412 
pNSeene St ae 20.13 | 10.49 | 3,965 | 4,940 | 3,679 | 4,505 | 4,656 | 3,568 | 2,866 | 5,370 | 6,398 | 5,229 
= less oem 20.81 | 0.93 | 2,874 | 4,352 | 3,876 | 3,759 | 2,845 | 2,815 | 1,238 | 4,758 | 7,268| 4,482 
ge eOY ON 22.91 | 6.23 | 3,685 | 4,436 | 3,931 | 4,158 | 4,039 | 2,738 | 2,270 | 4,551 | 6,765 | 5,076 
grr. Lerche 26.46 | 8.96 | 4,222 | 4,288 | 4,045 | 4,326 | 4,724 | 2,232 | 2,720 | 4,120 | 6,836 | 5,561 
The unit for # and y is 5 millimeters, which is approximately 
equal to 5’. The differences Ax, Ay are given in units of the fifth 
place of decimals = 0.003’”. The center of the plate is near # = 14. 
y = 14. 
Plate constants were then calculated in the usual way, by the 
formule 
Av = ax-+ by+e 
Ay = du + ey +f 
These were applied, and the residuals A,w, A,y converted into arc 
are as follows: 
TABLE XII.—Check plates, residuals. 
m1—-A wi—by So—Cy m—d 1-41 Mean 
Star. SS a SS SSS SSS EEE 
Ait. | Ary. | Art. | Ary. | Ait. | Ary. | Art. | Ary. | Art. |} Ary. | Ait. | Arg. 
as ay ay ” a” aw ay ar au aA tsa ar 
1 LEIS seat ie ee —0.02 |+0.02 |+0.29 |—0, 34 |+0.02 |—0.07 |—0.03 |+0. 22 |+0.49 |+0.01 |+0.15 |— 0.04 
Ee Sere ee + .39 [+ .15 |+ .16 |+ .14 |+ .69 00 |-+ .69 |— .29 |+ .10 |— .23 |4+ .41 |— .05 
Say. Gar Rut — .14 |— .04 J— .16 |4 .09 |— .38 |= .12 |— .02 |— .37 |— .54 |+ .12 |— .25 |— + .06 
Opt bean: ace 08), [rai dObihe <i debacavell panna 2 + ..25 [4+ .19:|— .2) |— .21]....... — .01 |— .01 | + .08 
(TAI eee — .06 — .10 |— .28 |+ .27 |— .09 |4+ .14 |— .10 J+ .12 |+ .15 J+ .49 |— .08 | + .18 
PES Se | BLY — .06 |— .28 |— .10 |— .16 |— .74 |— .09 |— .31 J+ .02 |— .39 |— .12 |— .32) — .13 
SION FY aeael ISO [Se SBA TOs ACE SES] PRED | I, Sere — .38 |— .68 |— .34 | — .17 
A0s- 26th. see. 6 — .02 |— .10 |J— .21 |4+ .52 |— .15 J+ .16 |-+ .08 |+ .25 |— .08 |4+ .34 |— .08 | + .23 
Ee ace Iie. — .46J/—.01 J— .13 |— .22 |— .13 J+ .11 |— .13 |4+ .71 |+..30 |— .28 |— .11 | + .06 
pa Pile saemael + .16 |— .14 J+ .13 |— .04 J+ .19 |— .06 |+ .17 |— .09 |— .13 |+ .08 |+ .10 | — .05 
USis. ee Caee 6d! + .59 |— .12 |4+ ..32 |— .26 |4+ .34 |— .25 |— .13 |— .88 |4+ 248 |+ .28 |4+ .32) — .15 
