44 RECONNAISSANCE FROM CARROLL, MONTANA, 
Determriiation of the latitude by observed double altitudes of Polaris off the meridian. 
Station, Camp Baker, Montana.—Duate, July 31, 1875.—Ref. Circle, Gambay & Son, 212—Chronometer, Boud & Son, 202.—Observer, Wood. 
Computer, Wood.—Bar., 25'».24.—Ther., 60°. 
Observed double altitudes. Uorresponding times. 
Op Ae ot hom &. log cos p = 9. 6527431 log sin p 9. 95098 
18 35 49.5 log A = 3. 6804864 log A 3. 68949 
36 48. —- - 
37 22. log A cos p = 3. 3422295 log Asin p 3, 64047 
3757. = 2199" —- 
3B 22.5 = log (Asin p)? 7. 28094 
38 53, oO i log a 4. 38154 
39 23. ist term = 36 39 log tan A 0, 01601 
40 32. Alti=A = 46 03 21 —- 
720 00 00 41 19.5 2d term = 48 log 2d term 1. 68149 
201 22 20 18 41 54. —_—. 2d term 48” 
= -—— Latitude = 46 40 48 
S21 QR 20 18 32 50.05 
92 08 14 
46 04 07 
46 
46 03 21 
FETEOION «. souseuesss seep eehas EemeRIS: ISRO EoaeeR RS soe 46" 
Chron. correction . — 1" 12m 759,05 
DeGrods ea esccue, s Z 1° Q1/ ux!’ 
A cadateideees saceaees scent Reeehrayet beyed beam Cemented! 7 4892" 
hom. 8 
AY: TONG TG ese uisrars.citinte otais lepolels g siematmeis ecesinieinnaes 4 SRR EMEE Se naam § aanse este 1 13 05 
Sid. time at mean noon at this station....-..- 
Sid. interval from mein time of culmination. 
Retardation of mean on sidereal time 
Mean time of culmination of star....-.- 
Error of chron. at time of observation 
aa Pata attest atodeee eyasaharette ana. cesiedis 1 12 35 
Time by chron, of culmination .........-...--- 022-2222 e eee eee eee 2 25 40 
Clock-time of Observation .22nscea ws ses ceew se ceses wesarersee eames 18 38 50 
Hour-angle, p, in sid. time ... : se 7 46 50 
Sidereal equivalents in arc... 2.2.2... ee ce ene cee ee eee rec ene eee 116° 42 30” 
pinare 
