ON THE SEASONAL VAKIATIONS OF TEMPEEATDEE. 



503 



CUHVE XIX. — Reservoir, Northampton. 9 A.M. 

 Air Water 



Arat. 



The record extends from August 1888 to July 1891 and is of unbroken 

 regularity. Observations were made daily at noon from August to 

 November 1888 and thereafter at 9 a.m., by Mr. G. Taylor at a point in 

 the grounds of Inveraray Castle about one mile from the entrance of the 

 Aray into Loch Fyne. At the place of observation the river is to a slight 

 extent shaded by trees, but it is a typical Highland stream flowing rapidly 

 from a bare moorland glen and subject to frequent and rapid floods. The 

 Curve No. XX. (see Plate) shows that, as in other rapid rivers, the 

 water is always of lower temperature than the air, and as the winters on 

 the west coast are not severe and the water rarely falls to freezing point, 

 this relation holds good for the weekly means all the year round. Sudden 

 falls of temperature are common in summer after heavy rain on the sur- 

 rounding hills, and sudden rises of temperature, although not to such 

 a pronounced degree, frequently follow a heavy shower in winter. 



