for ascertaining the distances of clusters of stars, &c. ^6 1 
easily be made to act as finders to themselves, by using a 
double eye glass with a large field of view and a small 
magnifying power. It is indeed very obvious that when a 
small telescope, acting as a finder to a larger one, has not 
sufficient light to show the objects we look for, a more 
powerful one must be used. In this manner I have often been 
obliged to have recourse to a 10 feet reflector as a finder, to 
point out the situation of an object to be viewed in the 20 feet 
telescope. 
It may have appeared singular, that among the observations 
which have been given, there are many that were made by 
the 7 and 10 feet telescope finders, but the important use of 
these observations will appear in the consequences that may 
be drawn from them ; for the clusters of stars, No. 2, 3, 5, 
12, 3°>33> 34> 53> 75, and 9 2 of the connoissance were all to 
be seen in these finders ; they were, however, not seen as 
clusters of stars, but as ambiguous objects. No. 12, 30,34, 
and 75 were but just to be perceived ; No. 2 and 92 appeared 
like stars with rather a large diameter ; No. 3 and 5 like 
hazy stars ; No. 33 and 53 like small hazinesses or nebulo- 
sities ; and yet they were all proved by the telescopes in 
which they were critically examined to be clusters of stars. 
If then a cluster of stars in a very small telescope will appear 
like a star with rather a larger diameter than stars of the 
same size generally have, we shall certainly be authorised to 
conclude, that an object seen in a larger and more perfect 
telescope as a star with rather a larger diameter, is also an 
ambiguous object, and might possibly be proved to be a 
cluster of stars, had we a superior instrument by which we 
could examine its nature and construction. 
