■396 Proceedings of the Boyal Physical Society. 



ture exceeded the normal by 2°-3, there being an almost 

 complete absence of frost or snow. The unusual pheno- 

 menon of a winter thunderstorm was observed on the 

 19th at 5.45 P.M., and a bright aurora was seen the same 

 evening. 



Fehruary was characterised by a low mean pressure, very 

 low temperature, a precipitation nearly double the average, 

 and a slight deficiency of sunshine. During the first half of 

 the month very cold weather prevailed, with frequent gales 

 and heavy snow. The minimum temperature for the year, 

 17°, was recorded on the 8th, and the lowest barometric 

 pressure, 28'391 inches, on the 19th, on which day the rain- 

 fall amounted to the large quantity of 1'28 inches. 



In March the mean barometric pressure was over two- 

 tenths of an inch above the normal, the anti-cyclonic 

 conditions being accompanied by a low temperature, small 

 rainfall, and much cloud. Winds were light, and almost 

 wholly from the north and east. 



In April and May the mean pressure was in close accord- 

 ance with the average, temperature was above the normal, 

 and only two-thirds of the average precipitation was regis- 

 tered. There was an ex^cess of bright suu shine in April, but 

 in May, usually the sunniest month of the year, there was 

 a rather marked defect. 



The weather of June was characterised by a slight excess 

 of temperature and rainfall, but pressure and sunshine were 

 both less than the normal. A thunderstorm, accompanied 

 with great darkness and blinding flashes of lightning, occurred 

 on the evening of the 12th, being the severest experienced 

 in Edinburgh since the memorable visitation of the 12th 

 of August 1884. 



In July the mean temperature of the air was 61°, being 

 the highest July temperature in the Edinburgh district since 

 1887. The most striking feature of the meteorology of the 

 month was the unusual nocturnal warmth, the mean mini- 

 mum temperature being 5 4° •2. The only months since 1840 

 in which the average night temperature was higher were the 

 Julys of 1852 and 1855, with means of 56°-4 and 54°-9 

 respectively. As regards the other elements of climate, 



