Lyons — The Distribution of Mean Annual Rainfalt. .'-)63 



Supplementary Notes {Dublin). 



Mention must be made of some records in addition to those given above 

 for County Dublin. Leeson Park (1905-8) and Upper Leeson Street 

 ( ] 883-90) show a slightly higher rainfall than that of Fitzwilliam Square. 

 On the other hand, Donnybrook (1899-1902) is much lower ; and Trinity 

 College (1904-8) gives a record iiniformly less than Fitzwilliam Square. 

 Eccles Street (1873-7) agrees closely with Glasneviu. It is of interest 

 to note that the annual graph of Grlasnevin, though generally lower than 

 that of the City and Phoenix Park up to 1890, lies subsequently higher. 

 The cause of this anomaly is probably the changes made in the position 

 and exposure of the gauge at Grlasnevin about 1890.' The records for 

 Kush (1876), Skerries (1866-70), and Milverton Hall, Skerries (1907-8), 

 agree very closely with the records quoted for the coast- stations given in the 

 table. The record for Lambay Island (1907-8) is remarkably low, and 

 suggests a mean value of less than 27 inches. The record (1908) for Howth 

 indicates a mean probably greater than 29 inches. 



' In connexion with this matter Mr. F. "W". Moore, Keeper of the Royal Botimic Gardens, 

 Glasnevin, kindly writes in reply to enquiries as follows: — 



" EoYAL Botanic Gakdens, Glasneyin, Dublin, 

 "January list, 1910. 

 " Dear Sir, 



" I have been hunting up the records of our rain-gauge. I find that a change was made 

 in September, 1889, wliich would be likely to have largely affected the record of the rainfall, as a 

 collecting roof, which was formerly in use, was then changed to a standard gauge, which is still in 

 use. Again, in July, 1901, a change was made which would be likely to affect the quantity 

 registered, as the late Mr. Scott, of the Meteorological Office, considered that the railing which 

 enclosed the rain-gauge at that time was likely to affect the amount registered by intercepting some 

 of the fall. It was therefore moved to another position, and I do not think there is anything in the 

 present position more favourable to a heavier record than that to which the rain-gauge was moved in 

 1891. It is of somewhat lower level, 55 ft. On 30th November, 1899, the observer was changed, 

 and the present observer took up the functions. This might perhaps influence the readings, but 

 certainly not to a larger extent than 2 per cent. I think this answers all your questions ; but if 

 you wish for further information, please let me know. 



"lam, yours truly, 



"F. AV. Moore." 



[Tables II. and III. 



3n2 



