74 USE OF THE TABLES 
Pe-cuess 57°\dec. 19° 31/4 N. 
Ass. lat. 17° b 60° 41/6 N. A 22381 C 96 Z’ 65°8 
d+b 80 138.0 B 636 D 9237 
h. 36° 03/5 A+B 23017 C+D 9333 Z!' 12.2 
ho 35° 38/9 ae 
—_—— Z (N.) 78.0 (W.) 
a 24/6 (away) 4 282° 
Z 281 (pgc.) 
Error pge. 1° (E.) 
Case II (L. H. A. between 90° and 270°)—Problem 7.—On May 15, 1928, 
about 8 p. m., the U. 8. S. Mississippi making passage from Hampton Roads to 
Liverpool, while in D. R. position, latitude 40° 43’ N., longitude 68° 30’ W., 
observed the star Vega as follows: W. 7» 36™ 12°, C-W. 44 59™ 12s, chronometer 
1™ 1% slow. True altitude 14° 50.5’. 
h m 8 
IWeeioere Bose 7 36 12 
CeWiejaoe-ceeee 4 59 12 
CO eed oss 12 35 24 
CA Ge eee ae (+) 1 Ol J 
G. C. T. 16 May__ 0 36 25 or, G. C. T. 16 May 0 36 25 
R.A. M.S. ©_-. 15 33 49. ne 
Ca CC = S ; G. H. A. 16 May 314° 49/6 
Tab. III : 6.0 Corr. 04 367 9 01.5 
eaoi 2 Rain 2 ee ee Corr. 25 6.3 
(ks ta). ee 16 10 20.7 —= Saar 
R. A. * es 18 84 31. 3 G. H. A. 323 57.4 
nae ¢ Assumed long. 68 57.4 
Geta Aqsa see 21 35 49.4 W. =) a 
Acces Sided is bin 323° 57. 4' W. L. H. A. 255 00.0 
Assumed long_(—) 68° 57.4 W. 
Li & ae, eee 255° W. (or 105° E.) 
Reject. .=<.- = 180° 
os ae a is (illustrates Note 13 b.) 
t=75° | Enter Table I with t=75°. L=41° (page 41). 
L=41° | Find b, A, C, and Z’. 6 is given sign opposite to that of latitude (see 
Note 12). 
Combine }, with declination and always subtract. 
With value d+} enter Table II, pick out values B and D. 
Add A+B and C+D. Change Z’ to (—). (See Note 12.) 
Ce avs d 38° 42.7' N. 
Tab. I b 16° 34.8’ 8. A 16461 ©1397 Z! (—) 22°92 
(Subtract).d+b 22 07.9 B 42396 D 391 
he 14° 56. 7’ A+B 58857 | C+D 528 Zz!" = -'73°5 
ho 14 50.5 
% N53 E. 
a 6. 2’ (away) 
