relating to the sidereal part of the Heavens. 26*9 
VI, 36* is ‘‘ A very compressed cluster of small, and some 
“ large stars ; extended nearly in the meridian ; the most 
compressed part is about 8' long and 2' broad, with many 
“ stars scattered around it to a considerable distance.” See 
%• 15 - 
The construction of this cluster may have arisen from the 
situation of many stars in the same plane, drawn towards a 
centre by the clustering power, for any plane seen obliquely 
will have the appearance of an extended form. 
VI, 64 is “ A large cluster of stars, of a middling size, ir- 
“ regularly extended, and considerably rich. The stars are 
chiefly in rows.” 
Here each row of stars may have a different preponderating 
attraction, but every row will attract all the other rows; nay, 
from the laws of gravitation it is evident that there must be 
somewhere in all the rows together the seat of a preponder- 
ating clustering power, which will act upon all the stars in 
the neighbourhood. 
13, O/" Clusters of Stars of a peculiar description. 
The great variety of ways in wdiich the attractions of un- 
equally scattered stars may produce a clustering powder will 
be further exemplified in the following objects.* 
VI, 55 is “A pretty compressed cluster of very small stars; 
“ it is of an irregular figure, and has a vacancy in the middle.” 
This appearance may be accounted for by supposing, for 
instance, three, four, or a greater number of preponderating 
* See six clusters of stars of a peculiar description; one in the milky way VIII, 24. 
Three near the milky way VII, 26. 55. Connoiss. 4; and two at a distance from it 
VII, 1. Connoiss. 30. 
