FREE BOOKS

Author's List




PREV.   NEXT  
|<   8   9   10   11   12   13   14   15   16   17   18   19   20   21   22   23   24   25   26   27   28   29   30   31   32  
33   34   35   36   37   38   39   40   41   42   43   44   45   46   47   48   49   50   51   52   53   54   55   56   57   >>   >|  
st for hearth-stones, and the beds of ovens; and in lining of lime-kilns it turns to good account, for the workmen use sandy loam instead of mortar, the sand of which fluxes, and runs by the intense heat, and so cases over the whole face of the kiln with a strong vitrified coat-like glass, that it is well preserved from injuries of weather, and endures thirty or forty years. When chiseled smooth, it makes elegant fronts for houses, equal in colour and grain to Bath stone; and superior in one respect, that, when seasoned, it does not scale. Decent chimney-pieces are worked from it of much closer and finer grain than Portland, and rooms are floored with it, but it proves rather too soft for this purpose. It is a freestone cutting in all directions, yet has something of a grain parallel with the horizon, and therefore should not be surbedded, but laid in the same position that it grows in the quarry. On the ground abroad this firestone will not succeed for pavements, because, probably some degrees of saltness prevailing within it, the rain tears the slabs to pieces. Though this stone is too hard to be acted on by vinegar, yet both the white part, and even the blue rag, ferments strongly in mineral acids. Though the white stone will not bear wet, yet in every quarry at intervals there are thin strata of blue rag, which resist rain and frost, and are excellent for pitching of stables, paths, and courts, and for building of dry walls against banks, a valuable species of fencing much in use in this village, and for mending of roads. This rag is rugged and stubborn, and will not hew to a smooth face, but is very durable; yet, as these strata are shallow and lie deep, large quantities cannot be procured but at considerable expense. Among the blue rags turn up some blocks tinged with a stain of yellow or rust colour, which seem to be nearly as lasting as the blue; and every now and then balls of a friable substance, like rust of iron, called rust balls. In Wolmer Forest I see but one sort of stone, called by the workmen sand, or forest-stone. This is generally of the colour of rusty iron, and might probably be worked as iron ore, is very hard and heavy, and of a firm, compact texture, and composed of a small roundish crystalline grit, cemented together by a brown, terrene, ferruginous matter; will not cut without difficulty, nor easily strike fire with steel. Being often found in broad flat pieces, it makes good pavement
PREV.   NEXT  
|<   8   9   10   11   12   13   14   15   16   17   18   19   20   21   22   23   24   25   26   27   28   29   30   31   32  
33   34   35   36   37   38   39   40   41   42   43   44   45   46   47   48   49   50   51   52   53   54   55   56   57   >>   >|  



Top keywords:

pieces

 

colour

 

worked

 

smooth

 

strata

 

called

 

quarry

 

Though

 

workmen

 

quantities


procured

 

considerable

 
durable
 

shallow

 

expense

 
yellow
 

tinged

 

blocks

 

lining

 
lasting

courts

 

building

 

stables

 

resist

 
excellent
 

pitching

 

rugged

 
stubborn
 

mending

 

valuable


species

 

fencing

 
village
 

ferruginous

 

matter

 

terrene

 

crystalline

 
cemented
 
difficulty
 

pavement


easily

 

strike

 

roundish

 

Wolmer

 

Forest

 

hearth

 

stones

 
friable
 

substance

 

compact