462 



REPORl — 1891. 



Mean Temperature of Oherwell for Ten Years, 1882-1891. 



(The portion from October to December is tbe meaa of nine years, and 

 tbe yearly averages are also tbe mean of the nine years 1882-1890.) 



Extreme Values of Monthhj Means of River-Temperature and Range 

 between Warmest and Coldest Months of the same Name. 



EsTUAKT Temperatures. 



Abstract of Discussion of the Temperature of the Tidal Estuaries in the 

 South-east of England. By Dr. H. C. Sobbt, F.B.8. 



Temperature of tbe air on deck and of tbe water at surface and 

 bottom were made at high and at low tide from the yacht ' Glimpse.' 

 Tbe district specially studied extends from tbe Strait of Dover up ' the 

 mouth of the Thames ' to tbe West Swale and Chatham ; thence to the 

 estuaries of tbe Roche, Crouch, Blackwater, and Colne (where each 

 season's observations began and ended) ; to Walton Creek, tbe Stour, 

 the Deben, and the Aide on to Lowestoft. The open water most fre- 

 quently examined was that of the Swin and Wallet, from which the 



