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Show [ 174 J 486 CAMP ON THE RIO DE LO AMEIUCANO., (HIGH lN THE MOVNTMN.) .Determination of longitude, Februa·ry ~4, 1 44-altiludes of o. Lyr<e. 0 BSE R Y A TI.ONS. Double altitudes of a J,yrre. Time of chronomotrr. Def,.Y, . mnl. 81 00 81 35 82 Ol 82 2f> 82 59 Mean time. h. mtn. sec. 4 00 55 a. m. sec. /z . 00 !l 30 45 50 10 Index error = + 50 Al'C . RESULT OF CALCULATION. Rotan]. h. min. . ec. 0 15 17.2 m1'n. sec. 42 52.4 a. m 41 30.0 45 40 6 46 46.:3 48 18. f) Longitude. Dcg. min. sec. 120 34 20 Determination of latitude, Feb1·uary 24, 1844-altitudes of Polaris OBSEJtVATIONS. Double altitude~ of Polaris. Dq;. min. 7/f 44 74 tj!) .74 46 74 45 74 4G sec. 20 10 00 45 30 Index error - + 50 sec. Time of rhronomctrr h. !l 4 mm. 54 56 58 59 00 ~t'r 08 a. m. 00 01 3.1 5 l -- llESULT OF CALCULATTON. Truo altitude. Deg. mm. ser.. 37 21 56 Mean time. h. min, ser. 4 l !~ 00 a. m. Latitude---- De~. min. sec 3 46 58 487 [ 17-t J ~ UEVA HELVE1'IA IJelerrn-ination of lime, ll1u1·cfl 1 o. 1 44_oltiturle.' of the sun OB ERV TION:-- . ------------------ ---- FIIl!:>T S Eill Jo:i-. , Double altitudes or the sun's lower limh. Time or chronometer. I Double altitudcR of the ' HUn '~-• lo" or limb. Time of chronometer Deg. mm. MX. /,, 111 tn. sec. Deg. nti11. 37 40 15 7 45 sec. "· min. ser ~3 . 0 :3s 58 00 38 00 511 46 !32 0 39 l(j 00 7 49 06 7 38 14 50 47 08.0 39 49 59.0 38 33 10 27 15 50 30 5 117 f>9. 5 39 38 45 45 /I 40 O(J 5 L 04A 18 !33. G :~9 5:3 50 f>l 4:1.o RESULT OF CALCULATION. ------ -- Meun time. h. mm. ser. 8 06 '28 Retard. fl. mm. 0 17 .~fC 38 . ~ Determhwtion of latitude, il~w·ch l...J., 1844-rneridia n altitudes oft he 'fu n. Oll~EllV.ATION ._,, Double altitudes of the sun's lower limb. T ime of chronometer. Del(. min . sec. " nun . 96 49 sec 40 l I ::n :3G 97 0 ~ Of> '2!) 22 97 17 50 :ZQ 5!J 97 31 00 :3:~ 2H 97 37 00 :}5 5G 97 40 40 !37 :3:3 97 4 1 30 !l8 :35 97 51 50 tlfi 58 97 52 3Q 47 !) ~ \n 52 I I' !12 ()() Index error - - 6 soc. RESULT O_l;' CALCULATror-. . Tl'lie central altitud e. pparent tuuc of t ran~ rt . |