S2 ALLISON — ON THE METEOROLOGY OF HALIFAX. 



pitation was a very little below the average ; for while rain was in 

 excess, we had less than one inch of snow, and only on two days. 

 Fogs rose to the number of five, auroras five, hoar frosts six, thun- 

 der and lightning once — on 12th — ^first of season. A short gale 

 blew on morning of 20th, from E. S. E. ; frogs sang on 8th, and 

 mayflowers were in full bloom 12th. 



The mean temperature of May was a little lower than average. 

 On the 30th the great heat of 80^.2 was attained. The mean pres- 

 sure was not far from normal, but rather weak, and the Hygromet- 

 rical means were decidedly small for the season. The month was 

 also very free from cloud, and wind force less than usual. With 

 these conditions it is not surprising to find the rain fall deficient. 

 An eight years average gives 4.33 inches; this May only 3.19; 

 snow fall was inappreciable ; and fair days twenty one, or six above 

 average. Of fogs we had four, auroras six, hoar frosts two, thun- 

 der and lightning on 9th and 12th ; humming birds were seen 18th, 

 cherry blossomed 23rd, and the whole spring was rather advanced ; 

 the latest snow fell on 24th, melting as it fell. 



June, compared with this month in past years, was not unlike 

 May, compared with its predecessors : being slightly cool, some- 

 what low in pressure, and decidedly bright. The month was still 

 more dry than the foregoing, only 1.69 inches of rain failing. The 

 force of wind had previously been estimated. Now, having re- 

 ceived and placed in position an Anemometer, (Robinson's im- 

 proved,) I was enabled to measure the velocity, which in June gave 

 a mean of only 8.8 miles per hour, with a resultant direction 

 (calculated from direction and velocity) of south 70° west ; three 

 fogs were present, two auroras, no frost — the latest this season, 

 both at five feet above ground and on surface — coming on 24th 

 May. Thrice was thunder heard, and lightning visible on two oc- 

 casions, from beginning of 20th to end of 21st, both being fre- 

 quently heard and seen ; one solar halo, one lunar corona ; white 

 lilac bloomed 7th, the purple 8th, the apple on 6th, and white 

 hawthorn 7th, red clover blossomed 6th, the horse chestnut 2nd, 

 the honeysuckle 11th, strawberries were ripe 20th, peas blossomed 

 17th, grass mowing began 30th; the whole season was now deci- 

 dedly early. 



