1()0 ON RAIN, EVAPORATION, &C. 



management of water makes a part, whether for domeftic 



purpofes or for the arts and manufactures. 



For the fake of perfpicuity I have diftributed the fubjecl 



under four heads : 

 Di virion of the j . Of the quantity of rain and dew. 

 u je * 2. Of the quantity of water that flows into the fea. 



3. Of the quantity of water raifed by evaporation, 



4. of the origin of fprings. 



SECTION L 



An Efiimate of the Quantity of Rain and Dew that falls in England 

 and Wales in a Year. 

 Annual quantity Rain-gages have been fixed of late years in almoft every 

 of rain and dew part of the kingdom ; by means of them we are enabled to 

 Wa^ e n s ! land and determine, with confiderable exaftnefs, the depth of water 

 Inland counties that the rain yields in any given place. Inland counties have 



have lefs rain j e f s ra j n $ mn mar itime ones, efpecially thofe which border on 



than coafts ; and * r '• 



mountainous the weftern leas. But a lull greater difference leems to take 



diftncls have pl ace between a mountainous country and a champaigne, or 

 flat country : in the former there often falls double or triple 

 the quantity of rain in a year, that there does in the latter, 

 and never lefs than an equal quantity. It may be obferved, 

 that feveral years account of the rain at any place is required 

 before a medium yearly quantity can be obtained with fufR- 

 cient accuracy. The following is perhaps the largeft collec- 

 tion of accounts of rain fallen in different places in England 

 that has hitherto appeared : They are moftly taken from the 

 Tranfaclions of the Royal and other Societies, 



Mean annual depth 

 Quantities tabu* Counties (maritime) Places, in inches, 



latcd. Cumberland - - Kefwick, 7 years - - 67. 5 



Carlifle, i year - - - 20. 1 

 Westmorland - Kendal, 11 years - 59. 8 



Fell- foot, 3 years * - 55. 7 

 Waith Sutton, 5 years - 46 

 Lancashire - - Lancafter, 10 years - - 45 



Liverpool* 18 years ~ * 34. 4 

 Manchefter, 9 years » 33 



Townley - - * 41. 



Crawfhawbooth, near Hafling- 

 den, 2 years - 60 



Gloucestershire 



