of Heat over Islands. 



24i^ 



tions will only confirm the truth of my general conclusions. In 

 Ireland we thus perceive that the coldest district lies in the 

 north-east portion of the midland counties — probably somewhere 

 between the counties of Cavan and Tyrone, and that the warmest 

 region is situated along the coasts of Kerry and Cork. 



Isothermals of the British Isles*. 



I now proceed to examine how far the distribution of heat 

 over the island of Great Britain conforms to the general laws 

 that have been shown to regulate it in Ireland. Here there are 

 some remarkable conditions in the physical configuration of the 

 island which should be kept in view in considering its thermal 



* The fif^ures denote the meuii annual temperature, in deforces Fahren- 

 heit, corresponding to each isothcrnial line. 



