68 



J. HOPKrNSON — HEKTFOKDSHIEE EAINFAII, 



Table XIII. — Percolation theough 3 feet of Soll with grass 



GEOWING ON THE SUEFACE ; AND EvAPOEATION FEOM THE 

 SIJEFACE, BEING THE DIFFEEENCE BETWEEN THE PeECOLATION 



AND THE Rainfall; at Nash Mills, Hemel Hempstead, 

 Isi Apeil, 1842, 10 3 1st Maech, 1884. 



