M INERALOG Y. 39 



moll other kinds of Hones. The arable lands in the 

 province of jemtland, at Rettwick in Dalarne, at 

 Xir.nekuLe in Wef.e.gottiand, and in other places, 

 which con fill merely of a calcareous earth, or a 

 mouldered Qate, would furler a great deal from 

 the fun, and a dry feafon, if they were not co- 

 vered with lumps of limeftone, N 



The art of building cannot be purfued without 

 the ufe of limeftone •, and in this bufmefs alone 

 it is known, and made ufe of under different names. 



The {olid limefbone ( Seel:; vii. ) commonly 

 found in Sweden, is mofcly flatty, and when it is' 

 or fuch indifferent colours as not to deferve po- 

 lifning, is called in Swedim Telgftcn^ Alfvarften, 

 and Oelandflen, in Englifh fimply Limeilones. 

 The thickeit ilrata are always employed in large 

 works, to which purpofe they are very well 

 adapted •, and the thinner are cut into fquare (labs 

 to pave the floors, and for the flairs of houfes, 

 and are alio applied to other uies. But great 

 care mult, be taken in the choice of thefe flones, 

 fmce it will happen that the finer works, made of 

 this kind of flone, may, in length of time, crack 

 and break into two or more plates, efpecially if 

 they are expoied to the open air, becaufe this 

 ilone is for the mofl part fet with fmall partition 

 veins of indurated marie, which moulders in the 

 air. And this is the reafon why the uppermofl 

 flrata, in thofe quarries, are always rejected, and 

 regarded as a different kind ofdone, and are, by 

 the ^.w-difh workmen particularly, called Gorften, 

 in Englifh Rubble-ftone. 



When the limeftone is of brighter co- 

 lours, though fometimes no more than only 

 of a dark brown, it receives the pompous 

 name of Marble : and for fuch works as are 

 to be polimed, the pieces are always chofen out 



D 4 . of 



