294 



Mr. Henwood on the Variation of Springs. 

 Table VIL* 



* For want of better information, \ have assumed the eflects of rain at 

 all depths to be uniform ; — an assumption which 1 make without any in- 

 tention to advaiice such an opinion, and which we have at present no 

 sufficient knowledge either to confirm or disprove. It is also assumed that 

 in all the mines in this Table (VII.), the whole of the first year's results de- 

 pend on niin, and no part thereof on rain. — This also is merely taken for 

 granted, in order to compare the other values with one another. 



f When the observed quantities exceed the calculated, I prefix the + 



