545 
a western star, while on another night (Febr. 25) 2 eastern and 2 
western stars’ were observed. Further, on Febr. 14 (Mecca) and 
Febr. 21 (Jidda) no zenithpoint was determined and this was derived 
from preceding and following days. 
RESULTS FROM THE DETERMINATIONS OF TIME AT JIDDA. 
Star East Star West 
| - == er E.—W. 
ey ER: | Mean || T.L. i R. Mean | 
1911 + 2h + 2h 
Pam cos!) 71837 | 9589 | 23m 8563 | 8885 8530 23m 8558 | + 0505 
a 20 WS | 14.46 laet | 13.86 [3212 13.48 | + 1.63 
» 28 | 24.64 23.56 24.10 20.511 23.91 24.74 | — 0.64 
ye ead) | -SS206 34.11 33.13 31.42 33.93 32.67 | + 1.06 
ew a4 38.61 37.24 31.93 “|| “36500 38.05 37.02 | + 0.91 
Febr: 1 41.61 40.44 41.02 40.34 41.05 40.70 | + 0.32 
ES | 48.04 47.88 47.96 | 47.41 47.78 41.59 | + 0.37 
eee 0 0.47 59.27 59.87 | 59.72 0.14 | 59.93 | — 0.06 
Mei 508 | ABT, 24 482 5.08 | 4.80 | 24 4.94 | —0.12 
ES, 10.03 8.16 9.10 7.96 9.15 8.56 | + 0.54 
Wi, Veal 28:29 27.89 28.06 28.51 29.36 28.94 | — 0.88 
„ 18] 2.59 3.06 | 25 2.83 3.84 Mei Le AD 
20 | 14.12 14.84 14.48 14.19 15.81 15.00 | — 0.52 
ee Hi! 20.23 18.35 19.29 18.53 20.72 19.62 | — 0.33 
„Rd | 26.11 25.42 2511 25.14 25.63 25.39 | +- 0.38 
Mrch 2 | 10.84 10.14 26 10.50 9.21 9.80 26 9.51 + 0.99 
# 3 13.89 14.17 14.03 14.70 13.83 14.26 | — 0.23 
5 1 | 30.96 30.37 30.67 30.23 29.85 30.04 | + 0.63 
ee 36.80) |. Sel 35.25 || 34.94 | 35.47 35.20 | + 0.05 
, 19] 27.96 | 27.28 | 27 27.62 | 26:00 1590.18 Sly" on Op Tey x12 
ae 20.| 32.53 33.26 32.89 34.41 32.78 33.60 | — 0.71 
gee Zl 37.60] 37.72 | 87.66. ie 7285-1) 38.17 37.86 | — 0.20 
fe 23 | 47.84 | 48.75 | 48.30 || 48.32 | 47.84 48.08 | + 0.22 
96 
Proceedings Royal Acad. Amsterdam. Vol. XV. 
