o96 ALLISON ON METEOROLOGY. 



being not 75 per cent, of tlie average precipitation. Six auroras, 

 and only four fogs, and one gale were recorded. This storm began 

 12tli, 10 p.m. and lasted till 2 p.m. of IStb, from N. E., S. E. and 

 E., with rain showers. First Robins were seen 3rd. Dent de Leon 

 cut 10th. Camberwell Beauty Butterfly at 10 a.m. of ISth. The 

 N. W. Arm was completely frozen over on 18th. Eull blown 

 Mayflowers were plucked on S3rd. Swallows were seen 25th. 



In May the pressure rose considerably above the normal ; and 

 the temperature was slightly above the average. N. W. winds 

 prevailed; with comparatively small force from any quarter. 

 There was again much deficiency in precipitation. Only 1.58 

 inches raise, or about half the average. While the extraordinary 

 amount of 7.4 inches of snow fell this May — 6.8 inches coming in 

 one heavy fall on the 3rd ; — but still making, when melted but 

 2.34 inches, together with the rain, and resulting as I have remark- 

 ed in a large deficiency for the month. Ten auroras, six fogs, and 

 six hoar frosts were marked. No gale occured in May — the wind 

 never exceeding eighteen miles per hour. Latest snow fell on 

 the 15th. 



The June pressure was near the expectation of that month, 

 being 29.795. The temperature was generally very low, and the 

 mean but 55.°37 against 59.^27, the normal deduced from eleven 

 years. Once more the N. W. was the prevalent wind, with a mean 

 velocity from all directions of 5.98 miles per hour. The fall of 

 rain 2.96 inches nearly touched the average of this usually dry 

 month. We had four auroras, six fogs, no hoar frosts ; but on the 

 3rd., the unusual event of a gale in June was noted ; not strong, 

 certainly, but still it blew hard from 6 a. to 6 p., and at 7.30 a. 

 21.6 per hour was read. There had been dashes of rain and hail 

 the previous afternoon; and the pear tree had come into fall 

 blossom, among which much havoc was made. Apples blossomed 

 on 8th. Horse chesnuts 13th. Lilacs 16th. 



Again in July the pressure of the atmosphere deviated but little 

 from the eleven years mean ; being slighly in excess. The mean 

 temperature was a good instance of how nearly correct the deduction 

 of a normal from a long series becomes. 63.°48 being that result, 

 and 63.^43 the mean of this July. The maximum of 87.°5 occur- 



