334 METEOROLOGICAL REPORT, 1870, 



IRELAND. 



LEAST. 



Kenman House, Killarney ... 69*01 



Galway 44-84 



CuiTaghmore 40*94 



Collaltine Park 18*88 



Dublin 20*86 



Wexford 25*22 



At Greenwich the rainfall from January to June was 5*21 

 inches, the average fall in the first half of the year is 10*88 ; 

 therefore the fall in 1870 was less than one half the average. 

 The previous instances of small falls in the first six months of 

 the year are 1855, when it was 6*5 inches ; 1842 and 1847, 

 when it was 7 - 5 inches ; 1840, when it was 7'6 inches ; so that 

 the fall at Greenwich for the six months ending June, 1870, was 

 smaller than in the first half of any year between 1815 and 

 1869. 



The following diagram and tables have again been most kindly 

 prepared by Mr. George Clayton Atkinson, of Wylam. Every 

 year adds both to the interest and usefulness of these tables, and 

 increases the indebtedness of the Club to Mr. Atkinson for his 

 very valuable assistance in this matter. 



It will be seen that the rainfall from March to September (in- 

 clusive), 1870, compared with the mean rainfall of seventeen 

 years at Wylam was below the average, while in October and 

 December it rose above it, the whole year's fall being however 

 two inches deficient on the average of those years.* The 

 greatest fall of the year was 1*52 inches on October the 9th. 



In the diagram the dotted lines represent the monthly mean 

 height of the Tyne at Wylam Bridge in 1870, compared with the 

 monthly mean height for ten years (1870 inclusive). These 

 lines ought to bear some relation to the rainfall, but it is difficult 

 to perceive it. They are introduced however as facts worthy of 

 consideration, and as affording data for investigation hereafter. 

 The river was highest on January the 8th and December 15th, 

 when the water rose to the 15 feet mark. 



" The amount of deficiency. 1-63 inches, given in the table, is for fifteen years. 



