230 Mr. Bowwditch’s estimate of the height Se. 
point, which could not be correct for the reasons stated in the for- 
mer part of this paper. By taking the second and third azimuths and 
altitudes of the meteor, as estimated by Mrs. Gardner, and finding by 
proportion the altitude corresponding to the azimuth 123°30’ or 124°, 
and allowing 9’ or 10’ for refraction, the altitude will be found to dif 
fer but few minutes from 5° 30’, which is made use of in the 14th. 
example. ‘The-estimated altitude would have been found nearly the 
same, if the four observations at Wenham had been taken into the 
calculation, by the usual method of interpolation, explained by Sir I. 
Newton in the Princip. Lib. 3. Lem. 5.* The results of the 14th. 
example are assumed in the right-hand columns of Table I, and in Ta- 
ble I, as the true values at that time, and it is evident that the lati- 
tudes and longitudes thus found must be nearly correct, since the 
meteor disappeared almost in the zenith of Weston, and a considera- 
ble error in any of the observations would not materially affect the re- 
sult, as appears by comparing examples 13, 14, 15, and 16. This 
latitude and longitude agrees nearly with that obtained in the 19th. 
example, by combining the azimuth and altitude at Wenham, with 
the azimuth 170° 30’ at Rutland, from which it appears probable that 
~ the azimuth of the meteor at Rutland, at the time of its disappearance, 
must have been about 170° 30’, and the corresponding calculated alti- 
tude at that place 5° 45’;+ but, by Mr. Page’s observations, the azi- 
* In putting A for the azimuth at Wenham and a for the corresponding altitude 
corrected for refraction, expressed in degrees and decimals, the formula of New- 
ton gives a=5°6972—0° 0009488 (A—106%91) (A—1 17°60) —-0°-00007012 
(A—106°91) (A—117°-60) (A—132°-26). 
+ Mr. 
tains, 
Page states that he saw the meteor till it descended below the moun- 
but as it was hazy in the direction of the meteor and the time early in the 
Morning, it must have been difficult to determine by observation the precise point 
of its disappearance. The above method of calculating the altitude must give it 
very nearly correct. 
