14 1878. Juli (July) 9. Lommechrouometer.. j 2 ll ' i J (Pocket-Chronometer.) 4;‘ 15’" 26/0 O .so0 20' + 4" 16 27. 6 10 + 8 17 27. 1 O + 3 18 26.0 49 50 — 5 IQ 26.4 40 — 6 20 27. 6 30 — 3 2 I 29. 2 20 + 1 22 28. 8 10 — 3 23 29. 6 0 -• 4 4 26 52.0 0 49 30 + 5 27 51.2 20 — 0 28 51.2 10 4 29 51-2 O — 7 30 52- 8 48 50 — 2 33 54-4 20 — 0 34 56. 4 10 + 8 35 56.0 O + 6 36 56. 4 47 50 + 3 37 55- 2 40 — 3 Beregningen giver d = ± 4."0. J 1 = + 11."5 ± l."8 = + 0.*77 ± 0.'12; Const. Corr. pan Hpjderne = -|- B."0 + 0."6 og som Resultat, naar den sandsynlige Fejl af den beregnede Lsengde saettes Lommechrouometer. (Pocket-Chronomet er.) 2 ll' j i8h 50“ 48/4 0 59° 10' - 14" 51 50.4 20 — IO 52 54- 4 30 — 7 53 56. 4 40 3 54 59- 6 50 — 4 56 2. 4 60 0 + 1 57 8. 4 10 — 10 58 10.4 20 — 1 59 13-2 30 + 4 19 0 18. 0 40 — 1 I 2 1.4 50 + 4 2 23. 6 6l O + 13 3 28.8 10 + 8 4 34- 0 20 + 6 19 7 5-6 0 60 40 — 2 8 9. 6 50 + 2 9 i3- 2 61 0 + 8 IO 20. 4 IO 2 11 23.6 20 + 7 12 30.4 30 + 1 14 42.4 50 — 4 15 45-2 62 0 + 10 16 52.8 10 + 2 18 0.0 20 — 4 19 5- 2 30 + 10 20 12.8 40 — 5 2 1 20.0 50 — 9 22 24. 8 63 0 + 0 Tlie computation gives d = + 4."0. J l = + 11."5 ± l."8 = + 0/77 ± 0/12; const, corr. in tlie altitudes - -j- B/'O + 0."6, and as result, the probable error of tlie computed longitude being put = ]/(0/12)" + D* + D* 4- D" + D9 + D + D2 + D9 = ± 0/41 ’ 1 2 3 i 5 C 7 l = V‘ 34”1 41/7 + 0/41 =.23° 40; 25."8>+ 6."1 E. Greenwich. Den sandsynlige Fejl svarer til en Afstand af 74 Meter. Efter Professor Fearnleys Beregning af Gradmaalingen, med Udgangspunkt Dorpat. skulde Lamgden af Meridian- stotten paa Fuglenes vrnre 23° 40' 0."9 E. Gr. Efter den af Svenskerne (Meddelelse fra Prof. Rosen til den geo- graliske Opmaaling) senere udfprte telegrafiske Lrengde- hestemmelse af Kokkomaki ((p — 65° 49' 16") — Stockholm, hliver Lamgden af Meridianstptten paa Fuglenes 23° 40' 22." 1 = P‘ 34’" 41/5 E. Gr. fra hvilken Bestemmelse min afviger kun 3."7 eller 0/25. der svarer til en Afstand af 39 Meter. The probable error corresponds to a distance of 64 metres. According to Professor Fearnley’s computation from the triangulation. -— starting from Dorpat. — the longitude of the Meridian Column at Fuglenes should be 23° 40' 0."9 E. Gr. Meanwhile, the telegraphic determination of lon- gitude for Kokkomaki (rp = 65° 49' 16") — Stockholm, subsequently performed by Swedish astronomers (communi- cation from Professor Rosen to the Geographical Survey), places the Meridian Column at Fuglenes in longitude 23° 40' 22."1 = 17‘ 34m 41/5 E. Greenwich from which result my determination differs only 3."7, or 0/25, corresponding to 39 metres.

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