ALLISON — ON THE METEOROLOGY OF HALIFAX. 85 



lunar halos, and two coronfe ; we had four days of sleighing. The 

 thermometer did not fall nearer than 4^.6 on Christmas Eve. 



Annual results are thus briefly summed up : 1870, mean tem- 

 perature 44^.67. Above average 1^.33. Maximum heat, 91^.5 ; 

 minimum, — 7'-'. 3; annual range, 98^.8; mean maximum, 53°.57 ; 

 mean minimum, 35°. 92; highest daily mean, 75*^ ; [lowest daily 

 mean, 7^.17 ; mean daily range, 17^.61 ; greatest daily range, 

 41^.7; mean pressure, (corrected,) 29.684 ; below average, .074; 

 maximum pressure, 30.484 in October ; minimum pressure, 28.455 

 in January ; whole range, 2.029; highest daily mean, 30.347; 

 lowest daily mean, 28.694. 



The mean elasticity of aqueous vapour was .278, and mean 

 humidity 78.3. 



Mean cloud was 5.4, which is 0.6 less than a four years aver- 

 age ; N. W. wind prevailed, with an estimated mean foree of 1.8, 

 or 0.3 below eight years average. 



We had 48.27 inches of rain, 4.81 above the average. This 

 fell on one hundred and sixteen days, against one hundred and 

 eleven days in 1869, and one hundred and twenty three days aver- 

 age of eight years; 78.9 inches of snow fell, which is 6.Q inches 

 more than the average, and 13.4 inches more than 1869 ; number 

 of days of appreciable snow was thirty six, eleven less than usual, 

 but nine more than in 1869. The total precipitation, of rain and 

 melted snow added, reached 57,19 inches, 5.Q6 inches more than 

 the average, and 2.66 above the preceding year; of fair days, or 

 those entirely free from measurable rain or snow, there were two 

 hundred and twenty nine ; two hundred and four is the a\'erage 

 number. 



Days wholly or partly foggy were twenty nine, — in 1869 there 

 were thirty six fogs; fifty three auroras were observed, — in 1869, 

 thirty nine ; thirty three times was hoar frost formed, — in 1869, 37 

 times ; on ten days we had thunder, and on eleven days lightning, 

 generally together ; these numbers in 1869 were eight and seven ; 

 I saw twenty six lunar halos, and three solar halos, — in 1869 but 

 twelve of the former and none of the latter ; hail fell but once, 

 both in 1870 and in 1869 ; and four rainbows were noticed in each 

 year. Last year there were forty five days of sleighing, and in 



