130 Proceedings of the Boy at Physical Society. 



on the 31st. On the 11th the barometer fell to 28-836 

 inches, the lowest in May for twenty years. 



June. — Mean temperature 0°*3 above, and rainfall 34 per 

 cent, below the average. Although but little rain fell, there 

 were a large number of very damp and muggy days, especi- 

 ally from the 9th to the 17th, during which time the wind 

 blew from the east. Westerly winds prevailed during the 

 first week and last fortnight of the month. No rain fell from 

 the 7th to the 16th, while the heaviest daily fall was only 

 0"28 inch, on the 3rd. Hail fell on the 1st, thunder heard on 

 the 21st, and a slight thunderstorm on the 24th. A dense 

 wetting mist was experienced on the 9th and 10th. 



July. — During July the weather was dry, with a good deal 

 of sunshine, but no great heat. Kain was only 38 per cent, 

 of the normal, and there were only three wet days from the 

 6th to the 26th. The mean temperature was just the average, 

 the days being about a degree above, but tlie nights a degree 

 below their respective averages. The outstanding feature of 

 the meteorology of the month was the very high mean 

 barometric pressure, the highest in July since 1863. There 

 was a thunderstorm, with heavy rain, at 2.15 P.M. on the 

 28th. 



August. — During August, pressure, rainfall, sunshine, and 

 humidity were normal, but the mean temperature was 1°'2 

 above the average. The 9 p.m. temperature recorded on the 

 12th — viz., 69° — was unusually high, there being only three 

 higher 9 P.M. values in August since 1857. There was a 

 thunderstorm, with heavy rain, at 7.55 a.m. on the 16th; 

 while during a thunderstorm on the 30th, 1*42 inch of rain 

 fell in four hours. Hail fell on the 28th inst. Solar halos 

 were seen on the 9th and 15th. 



September. — The most noteworthy feature of the weather 

 of September was the phenomenally warm spell which pre- 

 vailed from the 3rd to the 17th of the month, the mean 

 temperature for these fifteen days being 63°'6, or 8°'5 in 

 excess of the normal. From the 4th to the 6th the weather 

 was excessively hot, the maxima being respectively 82°-0, 

 82°-8, and 80'^-0 ; while the minima were 59°-0, 57°-6, and 

 62°'6. The mean temperature was 70°"5 on the 4th, 70°'2 on 



