I 



zio A/r. Kersckel ofi the ■ 



ibregoiiig part of -this paper, is perfe6lly confident with fads, 

 and feems to be confiimed and eflabliflied by a feries of obfer- 

 vations. It Vv'ill appear, that many hundreds of nebulae of the 

 firft and fecond forms are adually to be (e.Qii in the heavens,' 

 and their phices will hereafter be pointed out. Many of the 

 third form will be defcribed, and inftances of the fourth re- 

 lated. A few of the cavities mentioned in the fifth will be 

 particularifed, though many more have already been obferved ;' 

 lb that, upon the whole, I believe, it will be found, that the 

 foregoing theoretical view, with all its confequentlal appear-' 

 ances, as leen by an eye inclofed in one of the nebulae, is no 

 other than a drawing from nature, wherein the features of the' 

 original have been clofely copied ; and 1 hope the refemblance' 

 will not be called a bad one, when it fhall be confidcred how- 

 very limited muft be the pencil of an inhabitant of fo fmalF 

 and retired a portion of an indefinite fyftem in attempting the 

 picture of fo unbounded an extent. 



But to proceed to particulars : I fhall begin by giving the 

 following table of gages that have been taken. In the firft 

 column is the right afcenfion, and in the fecond the north ■ 

 polar diftance, both reduced to the time of Flamsteed's 

 Catalogue. In the third are the contents of the heavens, being 

 the refult of the gages. The fourth fhews from how many' 

 fields of view the gages were deduced, which have been ten or 

 more where the number of the flars was not very confiderable ;' 

 but, as it would have taken too much time, in high numbers, 

 to count fo many fields, the gages are generally fingle. Where 

 the ftars happened to be uncommonly crouded, no more than 

 half a field was counted, and even fometimes only a quadrant ; 

 but then it was always done with the precaution of fixing 01:1 '■ 

 fome row of ftars that would point out the divifioa of the field, 



fo 



