‘ 
CAM iPMENT ON gam LEFT BANK OF THE PLATTE eis 
Determination of latitude, BERET, 20, 1842 —alitude of Polaris. 4 
OBSERVATIONS. 
Double altitude of Polaris. ; Time of chronometer. 
eS .  n ae > 
Deg. min. 8ée. A min,  se€e 
83 40 30 10 21 37 
~ 83 A2 35..." * 10 24 20 
83 44 10 10 26 37 
83 45 05 10 28 46 
— es 46 00 10 30 61 
; 83 48 20 10 33 19 
83 50 40 10 35 24 
83 52 45 10 39 41 
83 53 50 10 41 22 
Se iw = © 10° 43 8 
Thermometer 40°. 
Index error = — 1 min. 38 sec. 
. RESULT OF CALCULATION. 
: “gf? ef 
True altitude Mean time Latitude. 
. : é b 
a min. set. hi min. — see. Deg. min. see. 
. 52+ 06 8 43 56 41 a - 18 
non po ia wr ? 
Bas x s Marek! —€ BAL gn ¥ A! Ss" ' 4 ee 
. - 
* 3 
* £ 2 } ; 
= - e ts 
rs Je g g 
ce 38 
: a Sh : a 
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. SS 3 Of e 
ee e 2 
