the Meteor ofFehruary 11,1 850. 265 



miles ; from the Chester observation, with the first estimated 

 altitude, it was 82 miles, and from the measured altitude it 

 was 76 miles. I think the observation at Yeovil is entitled to 

 double the weight of that at Chester, particularly as the latter 

 observer was riding in the direction of east and west, and 

 he had to turn his head to see the meteor. The meteor, there- 

 fore, at the time of its first appearance, was at about the di- 

 stance of 84 miles from the earth. 



5. Determination of the Distances of the Meteor from the earth 



at different parts in its path. 



At Chester, the Rev. H. Linthwaite lost sight of the me- 

 teor at a point 18° E. of S., and at an altitude of 42° 54'. 



This azimuth intersects the line of direction of the meteor 

 at a point about 8 miles west of Kidderminster, and at the 

 distance of 5 1 miles from Chester. Hence its distance from 

 the earth at this time was 48 miles. 



At Yeovil, the observer lost sight of the meteor behind a 

 chimney, whose azimuth was 11° 40' E. of N. This azimuth 

 intersects the line of direction at a point 7 miles E. by N. 

 nearly from Stourbridge, and at a distance of 99 miles from 

 Yeovil. Hence its distance at this time was 42 miles*. 



At Reading, the observer first saw the meteor between 5° 

 and 8° W. of N. Assuming that this azimuth met the line of 

 direction at a point about 5 miles S.W. of Northampton, at 

 the distance of about 53|^ miles from Reading, with the esti- 

 mated angle of 26°, its height at this time was 25 miles. 



At Langport, the observer lost sight of the meteor when it 

 was at an altitude of 10°, bearing N.E. This azimuth inter- 

 sects the line of direction about 7 miles W. of Bedford, and 

 distant from Langport ill miles. Hence the height of the 

 meteor at this time was 23 miles. 



6. Determination of the Height of the Meteor at the time of its 



explosion. 



The data we have for this determination are the following : — 



At Euston Square, distance 40 miles, the altitude measured 

 was 23°. 



* At Hampstead Road, in account XII., the observer saw the meteor 

 shortly after its commencement, a little above the Pleiades, the altitude 

 of which was 32°. Assuming the altitude of the meteor at this time as 33°, 

 its distance from the earth was 60 miles. 



At the same place the meteor disappeared near the lower part of the 

 constellation of Cassiopceia, or above an altitude of 25°, and azimuth 36** W. 

 of N., hence its height at this time was about 24 miles. 



In account X., Mr, Hind observed the meteor pass from below « Persei 

 to a Cassiopceia. Assuming its altitudes at these times to be 374° and 28|° 

 respectively, with azimuths 60°, and 36° W. of N,, the heights were 83 

 miles and 28 miles respectively. 



Fhil, Mag. S. 3. Vol. 36. No. 243. April 1850. T 



