358 THE HOP CHOP. 



cious outlay in drainage and deep cultivation, been ren- 

 dered as productive as tlie greensand soils. Instances are 

 recorded of land thus brought into hop cultivation, which 

 but a few years before would let for only a few shillings 

 per acre, becoming, after an expenditure of about 20 per 

 acre, worth as many pounds to rent as it had been for- 

 merly worth shillings. When, however, either the upper 

 or the lower greensand comes in contact with the gault, 

 the soils are naturally of the best description. 



The following analyses indicate the characters of the 

 soils referred to in the investigation. The first is the 

 gray marl, which lies directly upon the green stratum, 

 from which the soil proceeds a soil long noted for its 

 capability of growing famous crops of wheat and beans 

 alternately, without any additional manure: 



Insoluble silicious matter (sand), 19'64 



Soluble Silica, 6'45 



Phosphoric acid (equal to 375 bone earth), I 1 82 



Carbonic acid, 28'98 



Lime, 3771 



Magnesia, -68 



Oxide of Iron and Alumina, 3*04 



98-32 



The soil proceeding from this green stratum, with which 

 many fossils are intermixed, gave, on analysis, after these 

 fossils had been carefully separated, the following results : 



Insoluble silicious matter (sand), 32'81 



Soluble Silica, 29-14 



Organic matter, 3'02 



Phosphoric acid (equal to 13*63 bone earth), 6 '61 



Carbonic acid, 2'30 



Lime, 9'53 



Magnesia, 1 9 7 



Oxide of Iron and Alumina, 11*46 



Potash, 3-10 



99-94 



The soils proceeding from the gault formation were 

 found to be even still richer in potash and phosphoric acid, 



