Ee) 
increases as 
ave been examined, more than three thousand haye been 
ascertained to be double, it may be stated that the latter are 
or 
place of two thousand three hundred and seventy-four stars; 
which are mostly of the first to the sixth magnitude. All 
these were examined by Herschell who found one hundred 
and sixty-seven, of the first four classes, double, and to them 
sixty-three have been since added. Thus of two thousand 
three hundred and seventy-four, as far as the sixth magni- 
tude, there are twoh ed and thirty double, viz. one to 
eleven. mee 
_ , The great catalogue of Piazza contains five thousand sev- 
en hundred and sixty-two stars. Deducting those of Flam- 
stead, there remain three thousand three hundred and eighty 
eight, mostly smaller, among which one hundred and thirty 
our are double, which is one to twenty-five. _ As to the stars 
which are much smaller, whose position has more recently 
been determimed, the proportion is about one to forty-two. 
