a Mr. South's observations of the apparent distances 



obtain the advantage of higher magnifying powers. By 

 this change they stand in order 92, 157, 181, 327, 413, 5i3, 

 and 787 ; the commonly used power being 181 : a rigorous 

 examination assured me, that the value of the one micrometer, 

 was also the value of the other. 



In the subsequent pages will be found observations of 

 about 160 double and triple stars, hitherto (as far as I know) 

 undiscovered : their apparent right ascensions and declina- 

 tions are, I hope, generally accurate to the nearest minute : 

 and should occasionally a greater error be detected, some 

 indulgence will I trust be extended to me, for they were 

 generally found at a considerable distance from the meri- 

 dian, when extreme unsteadiness of the stars, and unwilling- 

 ness to quit my observatory, rendered sweeping for new 

 double stars my only mode of passing the night in it : as 

 however they have been found on subsequent evenings from 

 the data here given, no difficulty in identifying them, can 

 reasonably be expected. 



In the former Paper, 37 double and triple stars were 

 selected as entitled to peculiar notice, these it was my inten- 

 tion to have subjected individually to a rigid investigation ; 

 owing however to the almost unprecedented bad weather of 

 the last autumnal and winter months, go only of them could 

 be re-measured ; and the observations, which are here sub- 

 joined as an Appendix, although not so complete* as I could 

 have wished, will still I hope be deemed not unimportant. 



The arrangement is somewhat different from that pursued 

 on the former occasion : instead of individual measures being 



* The Appendix contains observations of thirty-six stars j six however of them 

 offerno particular interest, and were measured inadvertently, under an idea that 

 they were vn-measured stars. 



