640 Proceedings of the Royal Irish Academp. 



An examination of the foregoing Table shows the following rela- 

 tions between the coefficients of terrestrial radiation : — 



n = 2-686 - 0-0262 60, 



i? = 29-18 - 0.415 6'o; 



so that, finally, the radiation per hour (E) is found from the equa- 

 tion — 



Hp+iO- 60T = 0, 

 where n and p have the values given above. 



