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irregularly modified. It is of the brightest crimson in 

 the centre. The tower left hand figure is uniformly of a 

 red jasper colour, which is not very frequent. Its fracture 

 shows it to be not so tough and hard as jasper. This is 

 rather partially covered with an ochraceous hue. The grey 

 and black flints are not very rare: they are mostly found 

 in wet clavey places, and are often very black, sometimes 

 shining, or blotched with grey or a whitish hue; and, when 

 so, are mostly lighter within under the black outside, and 

 darker under the grey outside. 



Pebbles, if of a fine ochrey hue, from the size of a horse- 

 bean to that of a Windsor-bean, are used for making foot- 

 ways or walks in our best gardens; and are sold in the 

 vicinity of London from 10 to 12 shillings per load, under 

 the name of gravel; the coarser sort are used to mend the 

 roads*. 



They are often useful, as at Sandown Castle, near Deal, 

 to defend the coast from the encroaching ocean. They 

 are certainly of more use than they are imagined to be 

 in agriculture f; and protect the vegetable earth from the 

 violence of the high winds, while they retain the night- 



* It might be observed that they should not be brought from the damp pits 

 in which they are found to sudden heat or cold, as it makes them rotten, unless 

 intended to be rendered so for manure. 



f Soil may be amended by the judicious farmer by adding or diminishing their 

 quantity according to what he wishes to cultivate; their composition, size, 

 sponginess, softness, hardness, and even shape, are of much consequence. 



a 



