Conjlruction of the Heavens, 25 



^ 



Sedi'ion of our fidereal fjlem. 



By taking out of this table the vifual rays which anfwer to 

 the gages, and applying lines proportional to them around a 

 point, according to their refpedlive right afcenfions and north 

 polar diflances, we may delineate a folid by means of the end'; 

 of thefe lines, which will give us fo many points in its fur- 

 face ; I fliall, however, content myfelf at prefent with a fec- 

 tion only* I have taken one which paffcs through the poles of 

 our fyftem, and is at re£langies to the conjunction of the 

 branches which I have called its length. The name of poles 

 feemed to me not improperly applied to thofe points which are 

 90 degrees diftant from a circle paffing along the milky way, 

 and the north pole is here aifumed to be fituated in R.A. 186" 

 and P.D. 58°. The fe£lion reprefented in fig. 4. is one which 

 makes an angle of 35 degrees with our equator, eroding it in 

 124I and 3041 degrees. A celeflial globe, adjufted to the lati- 

 tude of ^^"i .north, and having 0- Ceti near the meridian, will 

 have the plane of this fe£lion pointed out by the horizon, and 

 the gages which have been ufed in this delineation are thofe 

 which in table I. are marked by afterifks* When the vifual 

 rays arifwering to them are taken out of the fecond table, they 

 muft be projected on the plane of the horizon of the latitude 

 which has been pointed out ; and this may be done accurately 

 enough for the prefent purpofe hy a globe adjufted as above di- 

 tecled ; for as gages, exadly in the plane of the fedion, were 

 often wanting, I have ufed many at fome fmall diftance above 

 and below the fame, for the fake of obtaining more delineating 

 points ; and in the figure the ftars at the borders which are 

 larger than the reft are thofe pointed out by the gages. The 

 3 inter- 



