ASTRONOMICAL PROBLEMS. 519 
1.1.87 8 Geminorum R.A.= 7» 38™ 24s 
INTEID SGI Ar a 
angle P=155° 24’ Ist arc=27° 9'20"” angle P>90° 
i= 61° 42’ 66 is ° , 1, 
PO= 29° 25! 47” 2nd arc=88° 51 26'°6 
log cos P= 9:9586767 log cos 2nd arc= 8:2997467 
log tan PC= 9°7513982 log cos CP= 9:9399977 
log tan 1st are=19°7100749 18:2397444 
. —log cos 1st are= 9-9492781 
log sin P= 9°6193864 Se aes Im 
log sin PRB= 9°9447257 log COS CB= 8:2904663 
19°5641121 1.1.87 OB = 88° 52! 524 
—log sin (B= 9:9999172 Dear angle oe a oe 
SAU BL Esra 205 : 
logsin C= 9'5641949 1.1.95 angle (=21° 35! 495 
log cos C= 9:9683873 
CB=88° 52’ 53’-4 log tan PC= 9°7513982 
Ist arc=27° 40’ 45” log tan 1st are=19°7197855 
log cos 2nd are=61° 12’ 8’-4= 9:6827928 
log cos CP= 9°9399977 
19°6227905 
—log cos 1st arc= 9°9472193 
log cos PB= 9°6755712 
PB=61° 43’ 136 by calculation 
61° 43’ 13”-7 by Naut. Alm. 
log sin C= 9°5659390 
log sin C8= 9:9999197 
19°5658587 
—log sin PB= 9°9448016 
log sin P= 9°6210571 
.. P=180°— 24° 49! 4” 
=155> 17’ 56” 
or 10h Q)™ [18-7 
—8x*719 586 
R.A. of 8 188-102 21m 6s] 
il, Th, D5 72 38™ 539 by calculation 
7> 38™ 53°44 by Naut. Alm. 
Diff. 0b Om 0s-46. 
Problem X. On 1.1.87 @ Ursae Majoris by Nautical Almanack, 
R.A. = 105 56™ 448-83 ; Decl. =62° 21’ 38’°4. 
Cc 
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