278 Contributions to Meteorology. 



.703 ; for March, 789 ; for April, .717 ; for May, .764 ; for June 

 .756 ; for July, .818 ; for August, .81 8 ; for September, .804 ; for 

 October, .792; for November, .809; and for December, .787. 

 Complete saturation occurred in July, and is the only instance on 

 record here of such an occurrence. 



Main fell on 111 days, amounting to 50,035 inches on the 

 surface. It was raining 521 hours, 33 minutes, and was accom- 

 panied by thunder and lightning on 20 days. This amount of rain 

 exceeds by upwards of 7 inches the usual average amount com- 

 pared with a series of years, and was owing to excessive rains in 

 June and July. 



A very heavy storm of rain occurred on the 10th of June, which 

 lasted 28 hours and 48 minutes, and amounted to 6.175 inches* 

 There fell in one hour (from 5 to 6 p.m.) 0.933 inches, and from 

 6 p.m. to 7.28 p.m. the amount of 1.333 inches. The river sur- 

 rounding this Island rose 8 inches in height. 



Another storm of heavy rain set in at 3 a.m. on the 12th day 

 of July, and ceased at 12.40 p.m. of the 13th, and indicated a 

 depth of rain on the surface of 6.374 inches; it was acompanied 

 by a N.E. by E. wind. The river in the neighbourhood rose 

 nearly 2 feet in perpendicular height, and the amount of rain 

 which fell during this month was 12.214 inches, and is the most 

 rainy July on record. The amount of rain which fell in the 

 month of August was less than the usual mean quantity for that 

 month. 



Snow fell on 46 days, amounting to 58.96 inches in depth ; it 

 was snowing 281 hours, 30 minutes ; this amount shows a decrease 

 equal to 36.80 inches compared with the mean amount of a series 

 of years. February and December were the months which showed 

 the greatest amount of snow. The first snow of the season fell on 

 the 4th of November, and the last snow of spring fell on the 21st 

 April. 



Evaporation. — The amount of evaporation from the surface of 

 water, during: the seven months which the observations are recorded 

 (owing to the presence of frost) amounted to 18.730 inches, which 

 is 1.515 iuches less than the usual amount of last year. July 

 indicated about 1 inch less than the usual amount ; the amount 

 of ice evaporated during the remaining months of the winter 

 season showed about the usual average amount. 



Wind. — The most prevalent wind during the year was the N.- 

 E. by E. The next in frequency the W. by N., and the least 



