277 Nr.' 1770. 278

111. Fortsetzung der Planeten -Beobaclitungen im Jahre 1867.

F o r t u n a . (Berliner Jahrbuch 1869.) ----- - - - - 1867 M. Zt. Krernsrniinster. U d a d dd .rr

Ju l i 22 2 3 31

Aug. t

Juli 31 Aug. i

12 14 15

Aug. 12 14

Aug. 19 Sept. 6

Sept. 6

Sept. 6 9

13 19 21 23 26

Oct. 14

Sept. 1 9 23

Sept.30 Oct. 2

Oct. 22 24

Oct. 24 Nov. i

3 9

11 30

11h37m40sll 1 9h 38m30806 -5'44 - 18' 50' 8"O 1 1 32 41 ,32 ' 19 37 30,OO -5,46 -18 52 3194 10 53 35,77 19 29 47,45 -5,39 -19 1 1 2491 10 4 8 45,71 19 28 52,15 -5,46 --19 13 4252

H y g i e a . (Berliner Jahrbuch 1869.)

1 1 52 50,32 20 29 11,74 -0,03 -17 3 1093

10 56 24,37 20 19 55,14 -0,Ob -17 21 1299 10 47 8,72 20 18 31,01 -0,23 -17 27 2235 10 42 32,02 20 17 50,20 -0,36 -17 28 5 3 7 1

1 1 4 8 5,88 20 28 23.07 +0,05 -17 5 098

H a r m o n i a . (Berliner Jahrduch 1869.)

10 59 13,30 20 22 44,56 -1,50 -24 9 3898 10 49 36,69 20 20 59,48 --1,62 -24 17 4194

L a e t i t i a . (Bcrliner Jahrbuch 1869.)

12 17 23,65 22 8 43,63 -2,12 - 8 46 2591 10 53 51,@7, 21 55 56,OO --1,92 -11 28 1294

A I e x a n d r a . (Berliner Jahrbuch 1869.)

11 22 34,49 22 24 43,22 -8,09 + 0 18 093

J u p i t e r . (Berliner Jahrbuch 1867.)

I 1 12 11,01 22 14 20,24 -0,19 -12 20 5499 10 59 0,77 22 12 55,48 - 0 , i O -12 28 $998 10 41 28,98 22 11 7 , m -0,21 -12 38 5195 10 15 22,68 22 8 35,74 -0 ,08 -12 52 3018 10 6 41,30 22 7 49.05 -0,08 -12 56 3996

9 45 17.83 22 6 1,81 -0,14 -13 5 5996 8 30 19,89 22 1 49,49 -0,16 -13 26 2499

9 58 8,07 22 7 4,51 -0,13 - I 3 0 3499

P a n d o c a . (Berliner Jahrbuch 1669.)

11 6 35,82 22 59 57,29 +0,15 -11 38 3091 10 57 4,03 22 58 17,04 +0,23 -11 40 094

1\1 a s s a 1 i a . (Berliner Jahrbuch 1869.)

11 54 41,14 0 31 32,58 -6,42 + 3 48 50920 11 44 59,27 0 29 42,23 -6,42 + 3 36 2099

L u t e t i a . (Berliner Jalrrbuch 1869.)

10 32 41,04 0 36 3,17 -0 ,761 - 1 30 2291 10 23 28,59 0 34 42,32 -- - 1 34 2491

N e p t u n u s. (Berliner Jahrbuch 1869.)

10 39 47,69 0 5 1 4,10 +2,34 + 3 41 2493 I 0 7 35.57 0 50 19,lO +2,27 + 3 36 4799

9 35 27,15 0 49 37,84 +2,24 + 3 32 4095 9 27 25,73 0 49 28,20 +2,32 + 3 31 4396 8 11 30,33 0 48 14,90 +2,22 + 3 24 2392

9 59 32,96 0 50 8,29 +2,38 + 3 35 4395

- 1 7"8 -1898 -1898 --1793

- 190 - 1 9 1 - 196 - 1 9 5 - 296

- 399 - 495

-7' 14 9 0

- 199 - 1 9 t + 094 + 191 + 192 + 192

+ 191 - I91

- 491 - 399

--4094 -41 96

- 898 -

279 Nr. 1770. 280

L e t 0 . (Berliaer Jahrboch t869.)

1867 M. Zt. Kremsmiinster. a da d dd lc -- /- - - - -- Oct. 24 Nov. I

3 9

11

Nov. t 3 9

' Nov. 30

Dec. 22 27

Dec. 22 27

Dec. 27

I lh55"34'42 2h 7m 3847 0'00 + 9°39'20443 I 1 16 28,13 f 59 22,98 -0,12 + 9 33 091 11 6 45.75 1 57 32,12 +O,Ol + 9 31 5391 10 37 59,38 t 52 N,34 -0,14 + 9 30 594 10 28 32,19 I 50 44,80 -0,32 + 9 30 990

N e m a u s a. (Berliner Jahrbuch 1869.)

12 I 1 53,86 2 54 57,81 -0,97 + 4 17 5797 12 2 11,49 2 53 7,06 --1,06 + 4 '2 4892 11 33 1,88 2 47 31,88 -0,90 + 3 20 1698

E u r y n o m e. (Berliner Jahrbach 1869.)

10 44 35,47 3 21 45,11 -1,97 +13 24 2192

c a 1 1 i o p e. (Berliner Jahrbuch 1869.)

i t 37 17,4t 5 41 19,97 +3,39 +31 21 46t9 t i 12 20,40 5 36 1,71 +3,33 4-31 40 5693

E g e r i a. (Berliner Jahrbnch 1869.)

I 1 50 50,03 5 54 54,86 +4,30 +43 53 5894 I t 24 24,39 5 48 6,6E +4,23 4-49 15 2892

v e s t a . (Berliner Jahrbuch 1869.)

11 51 36,58 6 15 24,35 -1,61 4-21 34 5792

+53'49 +54 9 7 +53,7 +5499 +549t

- 192 - 299 - 293

$3292

- 2,2 - 293

-1094 -10'97

-1295

1869 Febr. 25.

Mai 18.

IV. Sternbedeckungen durch den Mond.

a Ta u r i Eintritt = 7h40m 5'22 mitt]. Zt. Kremsm. Beobachtung gut.

a L e o n i s Eintritt = I 0 59 36,63 : : sebr gut. Austritt = 8 41 56,46 : : nicht ganz sicher.

Austritt = 11 26 36,90 : : gut.

K r e m s m i i n s t e r , 1869 August 12. Gabriel Strasser,

On the Corrections of Bozcvard's Elements of J u p i t e r and S a t u r n (Paris, 1821). k. k. Professor ond Astronom.

By Hugh B F C ~ , Formerly of the Royal Observatory, Greenwich. (From the Proceedings of the Royal Society, 110, 1869.)

T h e T a h l e s of J u p i t e r and S a t u r y which have been used fnr some years past in the coniputations of the ,,BerlSner Jahrhuch" and ,,Nautical Almanac", differ more from obser- vation than i s consistent with the present requirements of astronomy; and, moreover, abundant means for the correction of Bouvards ,,Elements" exist in the publication of the Greenwich Planefrry Observations, 1750 - 1835, and the annual volunies issued from the Royal Observatory since 1836. The present work, which h a s been undertaken for

this purpose, is based exclusively on the Greenwich Obser- vatidns, 1750 -1865.

Each mean group of observations in the Greenwich Planetary Reductions etc. gives the mean error of the planet's tabular geocentric place, with i t s equivalent in terms of the heliocentric errors of the earth and planet; but in the present investigation the places of CarZini's Solar Tables, which have been used throughout the whole period (with the exception of 1864 and 1865), have been accepted without