75 

 CLIMATOLOGY. 



1 have thought it best to leave this chapter as it stood in the first edition and to add a 

 supplement instead of making changes in the original text and tables. — J. G. B. 



For numerous data and for information respecting various points not touched upon 

 here reference may be made to the chapter on Climate in Phillips' ' Rivers, Mountains 

 and Sea Coast of Yorkshire.' For a full account of the zones of altitude see Watson's 



Cybele Britannica,' vols, i and 4. The most complete and carefully prepared statistics 

 which we have respecting the climate of different parts of England are those contained in 



he Quarterly Reports of the Registrar-general, the Meteorological portion of which was 

 edited by Mr. Glaisher. From these nearly all the tables here used are taken. 



Zones of Altitude. — In Watson's ' Cybele Britannica ' the 

 surface of Britain is considered as divided into two what are 

 called ' Regions ' of temperature ; and each of these regions is 

 subdivided into three what are called ' Zones.' The two 

 Regions are divided from one another by the line of possible 

 cultivation, which may be placed at about 600 yards in the North 

 of England and declines to from 500 to 400 yards above the 

 sea level in the North of Scotland. That portion of the surface 

 which is above this line is called the Arctic Region, and what is 

 below it is called the Agrarian Region, the three zones of each 

 being respectively named Super-, Mid- and Infer-arctic, Super-, 

 Mid- and Infer-agrarian. Divisions such as these may be 

 employed with great advantage when we wish to indicate the 

 broad general features of that important department of climate 

 which is included under the head of temperature, and they are 

 exceedingly useful to help the mind to connect together those 

 districts which under a comparatively southern degree of latitude 

 have their temperature lowered by elevation with those tracts 

 which have a similar temperature under a more northern position. 

 Biit at the same time, we must, in using them, be careful to 

 remember that it is broad general similarities and contrasts only 

 which they will enable us to e.xpress, and that each, by imper- 

 ceptible stages of gradations, glides into those which come next 

 to it in place. 



April 1888. 



