O F E A R T H S. 49 



A light, friable, deep brown ochre is found in the filmres of a 

 limeftone-quarry at Bladon, near Belford, in confiderable quanti- 

 ties. It is of a very lax texture, of a dufly irregular furface, 

 foft to the touch, and ftains the hands j adheres firmly to the 

 tongue, melts flowly in the mouth, of an aftringent tafte, with 

 very little grittinefs. In water it moulders and breaks flowly. 

 Dry, it fhews fome few fpangles of micas. It does not effervefce 

 with Aqua fortis. In the fire it acquires a deep reddim-brown. 

 colour, with no additional hardnefs. It is a fine fpecies of 

 umbre (sj* 



(s) Ochrafufca, Terra Umbria dita. Da Cofta. Hift. Fofl". p. IQ.I. No. i. 



Terra five Creta Umbria. Charlet. de Fofl". p. 219. No. 7. 



Woodw. Meth. Fofl". p. 4. No. 18. etCat. i. a. 25, et 26. 



Ochra pallide fufca laevis, quae Umbria Pidtorum. Hill. Hift. Fofl". p. 63. No. r. 



Terra fubfufci coloris, quae a Pifloribus vocatur Terra d'Ombra. Mercat. Met. Vat. p. 23.. 



Humus nigro-brunea, Umbra Auflorum, Creta Umbria. Waller. Minerol. Spec. 3, 



VOL. I. H CHAP. 



