70 



J. HOPKINSON' — HEETFOEDSHIEE EAIlfFALL, 



Tabit: XVI. — Percolation- theotjgh 5 feet of Soil with the 



SURFACE KEPT FEEE FEOM VeGETATION ; AND EVAPORATION FROM 

 THE SURFACE, BEING THE DIFFERENCE BETWEEN THE PERCOLATION 



AND THE Rainfall; at Eothamsted, Haependen, 1st April, 

 1871, TO 31sT March, 1892. 



