^ NORFOLK. ^ 



quarr}'. Its cokur nearly white : its contextura 

 that of a hard Kcntifli chalk; but mellows, I 

 find, by keeping in a dry fituation. When taken 

 from the quarry (in 1782) it was too hard tQ 

 mark freely ; now (1786 J it is fufficiently foft 

 for the purpofe of writing. 



In ''joater^ it remains perfe<5lly concrete. 



In the acid of fea-Jdt, it, in a manner 

 wholly, diflolves ; the folution being almoft 

 limpid : but, in filtering, a foil of a dark- 

 brown colour, and a f^w (perhaps twenty) par- 

 ticles of fand are left in the filter. 



A folution of fait Gf tartar precipitates 

 the dilTolved particles \m fiozv-iz^hite powder. 



Therefore, this chalk is, in its natural fate, 



NEARLY A PURE CALCAREOUS EARTH. 



II. Mould. — Befides what come under the 

 idea of marls and clays, a variety of other earths 

 are induftriouily fought after by the Norfolk 

 hufbandmcn ; for the purpofe of bottoming 

 their farm-yards and dunghills ; with a view 

 to catch the drainage of the dung. The dung 

 andthem.ould are afterwards turned up and 

 mixed together ; by which means the mould 

 becomes faturated with vegetable juices com- 

 ipunicated to it by the dung : and it is a com- 



moi^ 



