510 



EEPORT — 1891. 



comparison with the Bristol Channel observations. The water was colder 

 than the air while the temperature was rising and at the seasonal maxi- 

 mum, but warmer than the air when the temperature was falling and at 

 the seasonal minimum. The range of sea- temperature was decidedly less 

 than that of air-temperature, and the curve for the water is more uniform 

 than that for the air, showing little tendency to follow sudden and tern- 

 porary changes. 



Belvedere Lake. 



Mr. J. Bayliss made observations on the east side of Belvedere Lake 

 from January 1889 to January 1890. Belvedere Lake is a small sheet of 

 water thi-ee miles south-west of Mullingar, in West Meath. The tempera- 

 ture of the water (Curve XXVIII.) was almost always higher thau that 

 of the air, and had a nearly equal range but was less subject to small 

 irregularities. 



Montlilij Means of Temperature Ohservations on Belvedere Lake, 

 West Meath. 



CUKVE XXVIII. 



-Belvedere Lake, West Meath, Ireland. 

 10 A.M. 



Curves. 



Weekly means of 

 water- and air-tem- 

 perature at twenty- 

 eight stations. The 

 curves are drawn on 

 the same scale, the 

 entries correspond- 

 ing to the average 

 temperature (usually 

 at 9 A.M.) for the 

 week ending each 

 Saturday. The tem- 

 perature readings are 

 corrected for instra- 

 mental errors, but in 

 several instances the 

 readings are subject 



to uncertainty sometimes on account of the observer only reading to 

 whole degrees or to half or quarter ^legrees. 



