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The weather during the greater part of this month was 

 fine and pleasant, and the average mean temperature 1 

 higher than it has been for many years. The amount of 

 rain which fell in the second week, and the last (our days 

 of the month is one-third above the average. I bunder 

 was heard in the evening of the 8th, and much lightning 

 observed. A phenomenon of rare occurrence was seen 

 about 9 o'clock P. M. on the 15th. A luminous arch re- 

 sembling a lunar rainbow stretched across the sky from 

 East to West, presenting a most beautiful appearance. 

 The Aurora Borealis was visible on the 29th in the N. W. 



Mean Pressure from the 3 daily observations 29.969 inches. 



Temperature Ditto 6o°. 4 6 



Dew Point Ditto 57°3 6 



Degree of Dryness .... Ditto 3°- ' ° 



Degree of Moisture . . Ditto 93? . 



Force of Vapour Ditto 0.508 inch. 



Least observed degree of Moisture ^04 



Maximum Temperature in Shade 79 



Minimum Temperature in ditto 37° 



Maximum Temperature in the Sun 107° 



Minimum of Terrestrial Radiation 3°° 



Mean Temperature of External Air 59 -55 



N. East . 

 N. West 

 S. East.. 

 S. West . 



