Table I. 



CALCULATION FOR FINDIKG THE LATITODB FROM OBSERVATIONS MADE NEAR NOON WITH THE 

 REPEATING REFLECTING CIRCLE. 



fVol. IX. to front p. 102 J 



11 49 36.9 Noon by Chronometer. 



TBoncHTON's Circle. 

 Instrument at 380= 40' 00' 



8th November 1817, very clear. 

 Mean Daily variation sun's declin. 



Quicksilver Horizon. 



22' 38" Log. 3.132260 

 92 1 Log. = 3.742018 

 Log Ar. Co. 24 hours, = 5.063486 



1.937764 = (86".6S 

 Corr. Isl series ^'^ = 8.68 



Var. declin. 22' 36" = 3.132260 



33 02 = 3.297104 



24 hours = 5.063486 



1.4928.50 = (31' 11" 

 Corr. 9d series j'^ =: 3.11 



Therm. 13.4 = 9.9944 



Barom. 743.0 = 9.9900 



Z dist. 66° = 2.1145 



63.9 = 184 



Var. declin. 22' 36' 

 30 5 



2.1173 : 



lar.o 



8.1 Parall. 



Log. = 3.132260 

 Log. = 3.256477 

 24 Ar. CO. Log. = 6.063486 



1.452223 = (28' 38 



Corr. 8d series ,', = 2.83 



122.9 

 2'2".9 Refrac. 



. Parallax. 



Therm. + Barom. 99844 



Z. Dist. 66 — 2.1145 



.52'.5 = 180 



86.65 

 31 



651 



11 ; 



Refractio 



2.1169 = 130.9 Refr. 

 8.1 Paral. 



122.8 

 ■ Parallax 2" 2".8 



,'5)117.76 Sum. 



Corr. 4th series 5.88, or 1st com- 

 pound series. 



117.76 Sum A.M. 

 28.33 P. M. 



).43 difference. 



Corr. 5th series ^^ = 2.98 or 2d compound 

 series. 



16° 34' 16" 

 — 2 2.8 

 + 2.83 

 + 14.10 



16 32 30.13 



485" 14^ 25" 

 + 720 227 45 12 



16° 34' 16" 



16° 34' 16' 



+ 1 



6.88 

 4.69 



2.98 

 47.76 



16 33 11.91 



280° 40' C 



+ 720 485 14 25 



16 32 57.98 



iSXf 40' 0" 

 + 1440 227 45 12 



947 45 12 

 486 14 26 



,', )462 30 47 



23 7 .32,35 

 66 62 27.66 

 16 32 8013 



SO 19 57.62 

 211.86 



1205 14 25 

 280 49 



,', )924 34 26 



23 6 61.62 

 66 53 8.38 

 16 .33 11,91 



60 19 .56,47 

 1942.15 



Log. 



9.7866230 

 0.0363793 

 2.3260490 



2.1490513 

 ,'=) i«o 



Log. 



9.7866230 

 0.0363429 

 3.2882828 



31112487 

 '„) 1291,9 



1'4',59 



Log, 



9.7866230 

 0.0363540 



3.3332477 



3.1662247 

 A) 1432.9 



1' 52" 54 



