79

or-6 i° 4‘4. 7

°"‘5 i3° 4‘5> 5

Q’"S 143° 6-4, 6-9

0 "5 119° 6, 6

°"’5 63° 47, 7-2

o-"5 1420 S’S. S’S

o"'5 15° 4‘5> 7

o"-4 3°3° 7, 7‘5

o,/-4 2320 6, 6-5

o"-4 67° 6, 7

°‘"4 â– 157° 6, 8

O’'4 65° 7,8

o-"3 70° 6, 6-5

v Scorpii (A-B)

42 Comae...

22 Crateris ...

2 Serpentis...

14 Lyncis ...

X Cassiopeiae /3 Delphini...

19 Draconis 7 Tauri <0 Leonis

4 Aquarii ...

o 2 24 (Burn. 235) Cass. (A-a)

X Aquilae (A-B)

Most of the first forty stars in this list should be divided by a 5-inch speculum or object-glass. The beginner will, however, find some difficulty in seeing the companions to such stars as /3 Leporis, 6 Serpentis, S Cygni, &c., with less than six or six-and-a-half inches of aperture. Such pairs as £ Herculis. S Cygni, 90 Herculis, &c., are often best seen in bright twilight, some of the best measures indeed of

5 Cygni have been made an hour before sunset. £ Bootis is almost invariably best seen in twilight. Six-and-a-half inches should show the first fifty or so on this list, but the tyro must not expect to see such stars as 95 Ceti or 1 Delphini double with such an aperture except on the very rarest occasions; at least nine inches will be requisite to see these well. An eight-and-a-half or nine inch telescope will exhibit the next ten or twelve stars, and ten inches should show the remainder. The distances under 5" in these lists are given, where possible, to the nearest tenth of a second, and the position angles to the nearest degree. The measures are mainly from Duner, Baron Dembowski, Burnham, Gledhill, Wilson, and Seabroke, &c., and are the latest the writer has been able to obtain ; but as many of the stars are binaries, a few years will of course make a considerable alteration in both the position angles and distances entered in the lists.

LIGHT TESTS.

y Crateris... 3" 102° 4, 11'5

v Ceti fl 82° 4’5, 12

P. xi. in Ursse Maj. (A-C.) 13" I420 6, 13

P. xvii. 94 Ophiuchi 4" 67° 7, 13

72 Virginis 30" 16° 7'5, i3

58 Ceti 3"‘5 15° 6-5 (var.) 14

15 Monocerotis (A-B, A-C, A-D) 2*7,15", 40' 206°. 15° 307° 6, 9-5, 15, 14

30 Pegasi... 5", 10" 20°, 220° 5> 14, 14

S Cancri ... 45" 121° 4'5 15

7j Canis Minoris 5" 30° 6, 15

£ Trianguli 4" 119° 5‘5> l5

P. xxiii. 179 Piscium 2"-4 228° 8‘5, i5

w2 Aquarii 5-6 89° 5, 15

no Herculis 55" 1 IO° 5, 16

85 Virginis 30" 320° 6, 16

B Equulei (A-B, B-C, A-D) 35", 3", 50" 314“ 140, 2;8° 5, 13, 16, 14

55 Andromedae 25 350 5’5, 16

P. xx. 177, 8 Delphini (A-C) 20" 121° 7’5. 16

P. xiv. 212 Librae ... (A-B) 10", 20" (A-C) 273°, 320° 6, 8, 16

14 Monocerotis 10" 207° 6, 16

H Andromedae 49" I IO° 4, 16

y Equulei (A-C.) ... 25" IO° 5, 17

t Bootis ... 10' 350° 4-5 17

94 Ceti ... ... ... 5" 260° 5-5 17

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