2'9 3494 2 2 0

Retrachtet man die Sterne innerhalb einer Kugelober-

flache mit Radius -, so wird fur alle Werthe von q1 und

qa (ql > qa) , sobald q1 < Q ist, nur das erste Glied der Formel (VIII) einen reellen Werth haben, also die Zahl der Sterne unabhangig von den absoluten Werthen von q1 und Pa, nur mit q1 - qa proportional sein.

b a

Fur die Bradley-Sterne ist Q ungefithr 01075 ; es miissten also die Zahlen der Sterne, deren senkrecht zum Apex projicirte E.B. zwischen 0!'005 und oI'o15, oI'or5 und

oI'025 u. s. w. bis 01065 und or075 liegen, einander gleich sein; die Beobachtung dagegen giebt fur diese Zahlen :

610 163 419 I l l

255 7 2 225

Die Hypothese von gleichen linearen M.P. und un- gleicher von der Entfernung zur Sonne abhhgiger Stern- dichtigkeit ist also bestimmt zu verwerfen. Es ist jedoch moglich, dass die M.P. ungleich sind und zu gleicher Zeit die Sterndichtigkeit sich mit der Entfernung zur Sonne andert.

Leiden 1898 Miirz. H. G. van de Sande Bakhuyzen.

Star Occultations observed at Windsor, N. S. Wales, during 189'7. By John Tebbutt.

I am indebted to Mr. Joseph Brooks, F. R. A. S., for kindly supplying me with predictions of the occultations of Nautical Almanac stars for the first eight months of the year. Occultations Nos. 7 and 65 were observed with the 31/4 inch, Nos. 2, 3, 67, 72 , IOI, 105, 106 and 132 with the 41/,inch, and all the rest with the 8inch refractor. - No. -

I

2

3 4 5 6 7 8 9

I 0 I 1 I 2

'3 14 ' 5 16 '7 I8 '9 2 0

2 1

2 2

23 24 2 5 26 27 28 29 30 3' 32 33 34 35

star

105 Piscium t,b Leonis

Leonis Quetelet 2 7 I 9 64 Arietis Lalande 6322

Lalande I 097 5 Lalande I I o I 2 Lalande I 1008 Lalande I 48 7 6 Lalande 14870

Lalande 20029 Lalande 2 I 32 2

BAC. 5286 BAC. 5 2 86 (I Scorpii

Lalande 16099

-

d = +23O 43'1,'

- - -

Lalande 16149 Lalande I 6 I 7 2

Lalande I 7 9 2 9 Lalande I 800 7 v Leonis Lalande 2 2 7 90 Lalande 2 2 8 I I A Ophiuchi A Ophiuchi BD. +302453 10"'

BD. +302455 10"'

Lalande 22536

-

- Ph.

D D R D R D D D D D I> D D D D D R D D D D D D D D D D D D D D D D D L)

-

- Lb.

Dk Bt Dk Dk Bt Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Bt Dk Bt Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk

- Windsor M. T.

an. 1 1 d gh2srn 6'5 2 0 10 9 11.6 2 0 I I 14 5.5

'ebr. 13 10 39 8.7 vlar. 9 6 50 50.0

9 7 14 30.1 I4 7 4 38.3

8 7 42 42.5 lpril 8 7 26 59.2

8 8 I 43.2 10 7 24 6.5 1 0 1 31 42.3 10 9 38 43.1 13 10 I I 49.4 I4 8 I 45.3 '9 7 59 42.4 19 8 48 5 7 4 I9 19 6 25.7

May 8 6 28 12.8 8 7 29 28.4 8 7 29 55.1 8 7 35 33.5 8 8 19 53.8 8 8 4 0 2 2 . 2

9 ~7 1 5 49.3 9 7 1 7 10.3 9 8 56 0.8

I 2 7 45 21.2

b e 9 7 9 7 .1

9 7 43 25.8 I4 9 23 1.3 I4 9 23 8.1

rulY 5 1 3 10.9 5 I I 5 59.0 6 9 25 55.9

- No.

~

36 37 38 39 40 41 42 43 44 45 46 41 48 49 5 0 5' 52 53 54 55 56 5 1 553 59 60 61 62 63 64 65 66 67 68 69 10

Star

Lalande 2 3 7 3 7

Lamont 1203 Quetelet 5530 Lalande 25206 Lalande 2 5 2 3 I 83 Virginis BAC. 4814 Lalande 28379 Lalande 2 83 7 7 AOe, 14700 AOea 14706 AOea 14773 BAC. 5197 AOe, 14841 Wash. Mur. Z. I 14. I 4 Wash. Mur. 2. I I 4. I 6 AOe, 15916 Lalande 32486 12~26910 - 1 ~ 3 5 '

Lamont 141 I

-

-

- Lalande 24826 -

- 13h5m5 - l Z 0 I I '

13 6.1 - 1 2 2 7 Lalande 25853 Lalande 25854 AOe, 13361

- Mag.

7 9% 8 ' l a 8 8 9

6 8 '14

8 9 9 8

6%

8'18

1

-

8 'I2

9

8 9

9 9'10

I 0

I 0

I 0 I 0 I 0

8 ' l a 9 'I4 8 9

8 ' l o 8

8 '14

8 n14

- Ph

D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D n D D

-

- Lb.

Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk' Dk Dk Dk Dk Dk Dk Dk Dk Dk I l k Dk Dk Dk

- Windsor M. T.

[uly 7d 6h~7m32fo 7 6 2 0 21.9

8 6 2 7 50.4 8 7 36 31.6 8 8 32 9.1 8 10 38 22.9 9 6 18 21.5

10 6 2 2 41.3 10 6 23 47.1 10 6 59 12 .2

1 0 I 2 1 35.1 I 0 9 54 28.0 I 0 I 1 35 12.1

1 0 I I 39 41.4 I I 7 8 4.0 I I 7 48 23.3 I I 8 40 32.1 1 2 7 2 1 4.4

bug. 3 6 2 1 26.4

1 8 42 30.4

3 6 45 53.9 3 7 5 46.5

3 7 23 54.6

3 7 53 46.0

4 7 '3 56.7 30 6 59 I"18 31 7 12 29.8 3 = I 40 55.9

Sept. I 6 51 9.4 I 6 51 33.0 I 6 53 1.5

3 7 12 42.0

3 7 24 28.0

3 7 58 18.1 4 6 44 31.7

2 2 I 3494 2 2 2

- No.

7 1 7 2 73 74 7 5 76 7 7 78 79 80 81 8 2

83 84 85 86 81 88 89 90 9' 92 93 94 95 9 6 91 98 9s

I oc I 0 1

I 0 2

Star

1 4 ~ 1m9 - I 7" 30' Lalande 25921 14~57m8 -22O6'

- - - -

Yarnall, 6306 AOe, 14620 AOe, 16505 A Ophiuchi A Ophiuchi AOe, 16531

AOe, 16563 A Ophiuchi A Ophiuchi AOe, 19362 A% 19371

-

- AOe, '9413 AOe, 20365 AOe, 20382 AOea 20416 Lalande 26866 Cinc. Z. 2 5 I 9 d = -20'44' d = - 2 0 54 Lalande 26892

BAC. 5253 ISh44?4 -24"23

-

- ffag

3 I12 7 I12 9

-

I 0 1 0

9 'Is I 0

7 'I? 8 8 4 4 I I 0

I 4 4

8 ' l a 8

8 'Iz 8 8 '14

8 '12

7 6 ' 1 2

8 ' 1 2

I o', I 0 6

6 9

10

- 'h

3 D D D D D D D D D D D D D D R R D D D D D c c c c c I: I: L L L

-

- Lb.

3k 3k l k 3k l k Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Bt Bt Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk

- Windsor M. T.

#ept. gh 5" 8?7 I 8 42 26.7 2 6 31 37-3 2 6 55 53.6 2 7 9 20.8 2 7 19 8.8 2 7 2 1 26.0 2 7 48 48.6 4 7 45 25.6

4 9 45 22.8 4 9 45 26.5 4 1 0 1 0 57.9 4 1 0 49 5.3 4 1 0 49 '4.5 4 1 0 5 7 25.9 4 10 5 1 26.9 6 8 5 1 41.7 6 9 18 49.8 6 10 9 28.7 6 10 16 23.5 7 9 4 0.8 7 1 0 5 39.0 7 1 1 1 2 54.4

29 6 54 52.1 29 6 57 6.3 29 6 59 23.1 29 7 2 7 39.c 29 I 32 50.6 30 7 50 49.5 30 9 5 29.8

Oct. I 7 26 57 .1

4 9 41 15.0

- No.

'03 '04 '05 I 06 107 108 I 09 1 I 0 I 1 I I 1 2

"3 114 "5 I 16 " 7 I 1 8 I '9 I 2 0

1 2 1

I 2 2

'23 1 2 4

' 2 5 1 2 6

' 2 7

1 2 9 I3C '3' 132 '33 I34

1 2 8

R e m a rks . 1, 41 8, 9, 10, 11, 12, 2 2 , 23, 241 26, 27 , 28, 297

52, 53, 571 62, 63, 64, 68, 72 , 13, 7 5 , 76, 17, 78, 81, 8 2 , 85, g8 i 89, 9I9 94% 991 100, 101, 103, Io9i 110, 114,

30, 32, 33, 34, 39, 41, 42, 43, 45, 46, 41, 48, 49, 51,

1 1 7 , 118, 119, 120, 124, 126, 129, 130, 131, 133, 134. Phase instantaneous and observation good. - 3, 7, 13, 15, 1 7 ~ 20, 25, 31, 44, 74, 112, 128. Phase instantaneous. - 38. Phase instantaneous and observation pretty good. - 6,

132. Phase not q$te instantaneous and observation good. - 61, 65, 66. Phase not quite instantaneous and obser- vation pretty good. - 14, 58 , 83, 121, 127 . Phase not quite instantaneous. - 7 0 , 95, 96, 102. Observation good. - 2, 84, 106, 116. Observation pretty good. - I , 14, 1 7 , 33, 34, 35, 38, 104, 106. Star blurred. - 2. Bright limb well defined, but rather tremulous. - 2 1 , 25 , 55 , 61, 62, 108, 116, 118, 119, 120, 124, 128. Observation on north quadrant. - 33, 34, 56, 60, 64, 67, 73, 741 7 5 , 77, 90, 97, 98, 100, 114, 123, 133. Observation on south quadrant. - 7. Disappearance about 80" from north end of terminator. - 8, 10, 58. Disappearance not far from south cusp. - 13. Disappearance about 15" or 20" from south end of terminator. - 16. Limb boiling greatly and

35, 36, 40, 5 5 , 56, 69, 90, 92, 93, 108, 115, 1 2 2 , 1231

star

doe2 16087 AOe, 16161

AOe, 16172 Cord. GC. 25984

-

- AOe, '8975 R Capricorni R Capricorni

Lalande 45801 2oh15m1 -19" 2'

Cord. GC. 2 7 8 7 6

Lalande 39 I I 6 2 1 ~ 10916 - 13" 59 2 1 10.3 -13 53

Lalande 4 I 29 I Lalande 4 I 33 7

2Zh31m3 -6'8'

-

-

- - -

Lalande 4 I 368 2 2 h 2910 -8" 43'

- 6 = -8" 7 ' Lamont 4494 Lalande 43 I 86

23h 2 1'116 + 1'8' Lalande 4 59 2 7

-

- h.

1 1 1 1 1 1 1 1 i 1 3 3 D D D D D D D D D D D D D D D D D U D D

-

- Lb.

3k Dk Dk Dk Dk Dk Dk Dk Bt Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk Dk

- Windsor M. T.

1ct. 7"48"10?7 I 9 2 5 54.9 I 9 32 18.1

I 9 56 51.5 3 6 5 2 29.7 3 I 49 29.4

3 6 8 7 40 2 2 38.0 56.1 6 9 o 25.6 7 8 5 ' 4.6 8 9 24 57.6

gov. 28 7 28 15.8 28 7 50 34.3 28 8 6 37.9 28 8 30 39.6 29 7 33 50.2 29 I 38 30.1 a9 8 1 7 8.8 29 8 2 1 24.5 29 8 43 16.0 29 8 5 1 26.4 29 9 I 4 45.3 29 9 16 24.5 29 9 24 4.0 30 I 3' 58.4 30 8 4 14.7 30 8 5 2 37.3 30 9 0 3.7 30 9 ' 7 13.1

Dec. 28 9 31 39.7 29 8 2 1 44.6 29 8 54 42.8

observation very unsatisfactory. - 14, 21, 31, 37, 46, 50, 54, 74, 84, 97, 98, 105, 125. Star faint. - 18. Obser- vation in full daylight, and correct to a second. - 19. 6 m ~ 3 s E and 121/,' S of Yar, 3356. - 21. 1 5 ~ W and 9'/,' N of Lal. 16149. - 22. 1 ~ 3 ~ W and 3' N of Lal. 16149. - 25. 2f6 W and I' N of Lal. 11929. - 28, 31, 32, 42, 107, 113. Observation through cloud. - 37. Un- certain to a second. I O ~ E and a few seconds north of 36. - 39. Suspected to be double. - 44. Time possibly half a second late. - 47. Disappearance on south limb. - 48. Disappearance near north end of terminator. - 50, 54, 97, 98, 105, 107, 113. Observation uncertain. - 54. Disappearance near south end of terminator. - 56. 26' W and 5' N of Lam. 1411. - 58. 29s W and 4 ' s of 57 . - 59. Disappearance 90" from cusps. - 64. zmqs E and 5' S of Lal. 24769. - 65. Disappearance about 30" from north cusp. - 67. I thought I could again glimpse the star 1?75 later. - 32, 68, 82, 87. North component. - 31, 69, 81, 86. South component. - 7 0 . Disappearance about 20" from north cusp, and identification doubtful. - 7 I . Disappearance by two stages about 10' from north cusp. - 74. 1'41~ W and 91/2' S of 78. - 7 5 . 1 ~ 1 2 ~ W and 9 ' s of 78. - 76. 5 o S W and 4 ' s of 78. - 77. 54s W

223 3494 22 4

and 1 2 ' S of 78. - 79. At the recorded time nearly the whole of the star's light vanished instantaneously leaving a copper-coloured speck in contact whose gradual disappear- ance occupied fully a second. - 84. North companion of 85. - 86. Just separated from bright limb which was steady and well defined. - 90. 1 9 ~ W and 51/a' S of 91. - 1 0 2 . Disappearance occupied half a second. 30?5 W and 6112' N of 103. - 105. 33!0 E and 6' N of 104. -

108. irngS-W a nd I 3' N of 109. - I I I , Just in contact with limb which was unsteady and badly defined. - I 16. 1 ~ 4 ' W and on parallel of 117. - 120. 19' E and 9' S of 121. - 123. 1 ~ 2 1 ' E and 1 1 ' S of 121. - I 24. 1f6 W and 10' S of 126. - 1 2 5 . A little south of and following 124. - 128. 4m32s W and 4' N of Lal. 43306. - 129. Disappearance on north limb. - 132. Disappear- ance about 60' from north cusp.

Observations of Hyperion and Iapetus m a d e with t h e 2 6 i n c h r e f r a c t o r of t h e L e a n d e r M c C o r m i c k O b s e r v a t o r y of t h e Un ive r s i ty

o f V i r g i n i a b y Ovmond Stone.

In the following measures, the angles given are each the mean of two comparisons; the distances were obtained from Eastern mean time [7sth meridian] is used. measures of double distances. Corrections have been applied for refraction.

April 24 8h58m24s 9 34 o

10 28 57 10 58 55 May I0 i

I 894 1 1 Eastern M. T. 1 p 1~ Eastern M. T. I s

100053 9h 7m50S 1 0 1 . 1 2 9 10 32

76.68 10 42 54 77.03 1 0 41 32

14h35m 8' 42034 15 1 7 2 0 46.15 9 30 49 152.22 9 49 5 7 152.50

X I 28 40 315.45 I 0 I 28 315.39

- -

130!'70 131.18 109.83 109.15

I 36.36

103.5 I 57.76 57.85

I 66.28 I 64.96

31.29 31.15 26.19

32.59 32.07

-

14h53mIIS 15 5 15 9 40 35 9 42 1 0

11 13 58 11 14 58

I 1 I 1 I

April30 10 1 0 56 233.51 10 23 17 138.26 I1 1 0 35 35 I 233.34 I 1 10 25 16 I 137.78

Mar. I ~ 16 36 o 3 I 4 34 31

1 5 I 7 33 7 15 2 24

16 7 25 12 13 15 30

14 49 40 '3 '3 38 46

' 3 45 36 14 14 49 I

15 19 19

1894 / I Eastern M. T. I p 1 1 Eastern M. T. I s

290.80 ~ 16 49 56 43.52 14 47 5 5 45.40 '5 3' 29

270.40 '5 19 5 5 270.09 16 24 4 1 2 1 . 1 1 1 5 10 17 I Z I . I I 1 5 16 2 7

117.96 '5 37 37 - 1 1 1 . 7 7

105.41 1 5 o 18 104.41 1 5 7 46

Mar. 21

April 2 7

16.94 - -

141.07 141.91 335.35 336.55

6.60 7.07 -

Mar. 23

April 24

June 3

4

14 28 41 I 4 33 '5 14 34 59

1 1 58 16

I 0 2 44 - -

9 o 47

9 3 5 7 9 2 28

I4 I3 37 - -

9 54 6 1 0 49 2 7

1 2 1 2 28

9 I 4 2

I 1 2 0 I 1

8 50 33

-

HYP

4

140!'30 141.51 '3 1.94

I 70.89 I 70.60 1 7 1.23

132.70

31.25 3 1.94 31.63

I 16.55

192.01

I 69.69

169.8 2

-

-

'69.35

Literarische Anzeigen. Ph. Fauth. Beobachtungen der Planeten Jupiter und Mars aus den Oppositionen von 1896-97 auf der Privat-

sternwarte zu Landstuhl III. - Herausgegeben auf Kosten der Kgl. Preussischen Akademie der Wissenschaften. Mit 147 Abbildungen und 5 Karten.

A. Wolfer. Publicationen der Sternwarte des eidg. Polytechnikums in Zurich. Band I. Zurich 1897. - Der vor- liegende Band enthalt die Beobachtungen, welche der Verfasser auf der Sonnenoberfliche in den Jahren I 887-89 angestellt hat.

Kaiserslautern 1898.

Inha l t zu Nr. 3494. H. G. van dc Sande BaRLuyzen. Ueber die Vertheilung' der Sterne im Raume nach der GrGsse der Eigenbewegungen. 209. - J. Tebbutt. Star Occultations observed at Windsor, N. S. Wales, during 1897. 219. - 0. Sfonc. Observations of Hypenon and Iapetus. 223. - Literarische Anzeigen. 223.

(feschlossen 1898 Mei 25. Herausgeber: H. K r e u t z. Druck von 0. S o h a i d t : Expedition: Kid, Wrangelstrease 6.