PHYSICAL Anp LITERARY. 111 
the tables already defcribed to be of the 
fame ufe as in folar eclipfes, fubftituting 
the long. * for the lon. ©, and, for the 
hour from noon, the equatorial diftance 
of the ftar’s ecliptic place from the meri- 
dian, converted into time at the common 
rate of 15 degrees to an hour. 
16. Ir the {tar have latitude, then the 
true lon. and lat. ) #* are meafured by 
arches, from the center of the moon, per- 
pendicular to a circle of latitude, and 
to a great circle at right angles to it, both | 
pafling thro’ the ftar. Hence, 
As radius to cof, tr, lat. D, fo true lon. 
yp 4* to the fame projected. And, 
_ As cof. tr. lon. y. 2* to radius, fo tan. 
tr. lat. to the fame projected: Or, 
* without any fenfible error, fo tr. lat. 
> to the fame projected. 
17. To find the correction of the paral- 
laxes for the latitude of a flar: Let CW 
(fig. 2.) be the ecliptic on the earth’s fur- | 
face, N its pole; CN a circle of latitude 
' thro’ the ftar; W its pole; V the given 
vertex, 
