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 that anything is impracticable, onlybecaufe 

 it has not yet been put in pradtice : The 

 mofl: obvious improvements have lain hid 

 for ages. I have been making experiments 

 for fome years paft on the durability of the 

 white ftone, and have built feveral fence 

 walls with it in the moft expofed fituations, 

 which have hitherto withftood the weather 

 perfedlly : The only precaution I ufed, was 

 to dig up the ftone early in the fpring, that 

 it might have the whole fummer to dry 

 (it is naturally very damp and moift), and 

 fo be better able to refift the frofts of winter, 

 and to cover the walls with a projecting 

 coping either of whins or fods. This 

 fecures them from perpendicular rains, and 

 though the fides are expofed to beating 

 florms, the wind which blows through 

 prefently dries any moifture occafioned by 

 the weather : Indeed I find, that the more 

 open the walls are built, the Icfs liable are 

 they to perifh. That part next the earth is 

 in mofl danger ; and, if it fhould be found 

 neceffary, the lowefl courfc may be laid 

 with flint, v/ith which the country abounds, 

 and which is quite durable. Thefe fence 

 walls are two feet thick at bottom, and one 

 at top, are four feet and a half high exclufive 

 of the coping, and feven yards in length 

 coft about fix fliillings; but the price muft 

 in a great meafure depend upon the diftance 

 of leading from the quarry, and on the eafe 



of 



