6 10 Proceedings of the Royal Irish Academy. 



winds are usually of moderate intensity : and it is well known that the land- 

 breeze at night is usually gentle as compared with the sea-breeze by day. 

 It is interesting to note that Table YI represents the summer months to 

 be those in which changes in direction of wind least frequently occur, and in 

 which the changes that do occur are almost as much in one direction as the 

 other. In these summer months the land- and sea-breezes should be most 

 marked. 



In concluding the report on the winds the author would point out that 

 the very laborious analysis of the records was done by Mr. James Lowry.. 

 b.sc. (losd.], A.B.C.S.I., who exercised the greatest care and exceptional 

 ingenuity in the work. 



2. Barometric Pressure. 



The numbers in Table YII refer to Blacksod, and were obtained from the 

 manuscript copies of the monthly summaries for that station. The mean 

 values for Clare Island would in the case of each month be slightly in excess 

 of those for Blacksod. The monthly means are characterized by the low 

 values for December, January, and February, and by the high values for 

 May and June as compared with those for Dublin and other stations in 

 approximately the same latitude in the British Isles. 



3. Air Temperature. 



In the absence of any satisfactory temperature records for Clare Island it 

 was found necessary to refer for the present report to the very complete 

 records of Blacksod. Blacksod is a Telegraphic Xormal Climatologieal 

 station. The results set out in the accompanying tables were obtained from 

 manuscript copies of monthly summaries which were kindly lent to me by 

 the Director of the Meteorological Office, London. The summaries for 

 Blacksod could lay claim to such a high degree of accuracy and reliability, 

 and the proximity to Clare Island is such, that it was decided to give in 

 detail in this report the temperature statistics for Blacksod rather than 

 attempt a general and problematical deduction of the corresponding values 

 for Clare Island. This decision was further justified by a study of the 

 Temperature Charts of the British Isles. 1 The mean monthly isotherms, 

 with certain exceptions, have such a form as to suggest that the mean values 

 for Clare Island differ but slightly from those of Blacksod. These differences 



1 See Meteorological Atlas of the British Isles (Official Publication of the Meteorological Office, 

 Xo. 53). 



