100 On Shooting Stars. 
Ca. sin. cCb 
In the same manner we obtain b2=—~—_,, — = 
sin. cbL, 
R’ cos. B’ sin. (x — A’) R” cos. BY sin. (x— A”) 
a sina 2) Sima = 
is evident that Bu=6x, and Aw=az being parallel with it. XBv is 
the apparent declination of the meteor seen from B, and Xv= 
R’ cos. B’. sin. (x—A’) tang. 0 
Vena ayy) — 2) ; 
where the meteor stood in the zenith, and we have tang. y= 
ro+vX tang. b! sin.(a — — A’)-++tang. B’ si B’ sin. (a! — a) In the same 
fide Nene +, In 
AAU SO}e =e , and it 
Put y=the latitude of the place 
Hen sin. (a’ — A’) 
tang. 6” sin. (w— A”)-+tang. B” sin. (a’ — 2) 
manner tang. y= a ay 
These two values of y should be exactly equal; but as the lines 
of direction are seldom given with such exactness as actually to in- 
tersect, these two values almost always differ somewhat, and this 
difference, if not too great, serves to shew the probable accuracy of 
the two observations; whereas, if the amount is considerable, it 
shews either that we have united too observations which are not cor- 
respondent, or that the observations are too loose to allow any con- 
fidence in the result. 
Finally take e the distance of the meteor from the center of the 
Cx _R’cos. B’ sin. (a/—A’) 
cosy |) cossysin (a= 2) F 
R” cos. B” sin. (a — A”) 
7 cos. y sin. (a” —2) 
of y, we may see how nearly correct we can regard the calculated 
height =e—R. 
The distance from the first place of observation, is Bu sec. b’/= 
R’ cos. B/ sin. (xv — A’) R” cos. B” sin. (v— A”) 
sin. (a’—2) cos. 6’ — sin. (a”—2x) cos. 6” 
A detail of the observations and the calculations for each meteor 
would probably possess little interest for most readers of the Jour- 
nal. The more important results are contained in the following ta- 
ble. A few particulars respecting individual meteors are appen- 
ded. 
earth, we have e= 
; and if we here employ the two values 
; from the second = 
