266 Mr. J, Glaisher's additional Observations on 



At Reading, distance 53| miles, the altitude measured was 

 16°, or rather more. 



At Rugby, distance^Sf miles, the altitude measured was 20°. 



At Carrington, distance 73 miles, the altitude measured 

 was 13°. 



At Hull, distance 118^ miles, the altitude estimated was 12°. 



At Prestwoodj distance 80 miles, the altitude estimated was 

 15°. 



At Durham, distance 197 miles, the altitude estimated was 



K50 

 O^ . 



Hence, from the observations at — 



Euston Square its height was 17 miles. ' 



Reading ... 16 ... 



Rugby ... 18 ... 



Carrington ... 17 ... 



Hull ... 27 ... 



Prestwood ... 25 ... 



Durham ... 21 



Giving double weights to the results from the measured angles, 

 the resulting mean value is 19 miles as the distance of the 

 meteor from the earth at the time of its explosioni 



7. Determination of the height of the parts of the Meteor while 



luminous after explosion. 



The data we have for this determination are the observa- 

 tions of the Astronomer Royal at Greenwich, and those of the 

 Rev. J. Wharton at Brighton. 



At Greenwich, distance 44 miles, the altitude of the bodies 

 was 14° 53'. 



At Brighton, distance 88| miles, the altitude of the bodies 

 was 7°. 



Hence the height of the luminous bodies at this time from 

 both these observations was 10 miles. 



8. Determination of the real size of the Meteor at the time of 



its explosion. 



I cannot pretend to determine this point with any great 

 precision, it having been so differently represented by the dif- 

 ferent observers. The data we have for this determination are 

 the following: — 



1st. I shall confine myself to the description of those ob- 

 servers who were situated within or about 50 miles of the place 

 of explosion. 



At Hampstead Road it was about four times as large as 

 Venus. 



