ACCOUNT 



or A 



WHITE LUNAR RAINBOW, 



Seen at Manchester, on the 14<A of January, 1827. 



BY JOHN BLACKWALL, F. L. S. 



(Read October 5th, 1827.) 



On the evening of the 14th of January, 1827, 

 I had an opportunity of witnessing a white lunar 

 rainbow, a meteor of such rare occurrence, that 

 I have been induced to draw up a succinct ac- 

 count of the principal circumstances under which 

 it was seen. In the early part of the day, there 

 was a violent gale from the west, with a little 

 rain ; the temperature of the air, as indicated by 

 a thermometer in the shade, being 50*^ : the ba- 

 rometer was going down at the time, and, at 

 llh. 30m. A.M., had sunk to 28.78 inches, the 

 mean height of the instrument, in the situation 

 it then occupied, being 29.54 inches, on an ave- 

 rage of six years' observations. Towards noon, 



