MINERALOGY. 255 



broken from the above-mentioned 

 Fiell in Serna *. 



SECT. CCLXXVL 



B. Conglutinated {tones of granules or lands 

 of different kinds, Saxum conglutinatum gra- 

 mdisfeu arena variorum lapidum. Sanditone, 

 Lapis arenaceus. 



In this divifion are reckoned thofe which 

 confift of fuch minute particles, that all 

 of them cannot eafiiy be diicovered by the 

 naked eye. The greateit part, however, 

 confift of quartz and mica, which fub- 

 ftances are the moft fit to be granulated, 

 without being brought to a powder. 



I think I have realbn to confider this kind 



in regard to the fubflance which has ferved 



as a cement to combine them, although It 



is not always perfectly difcernible. 



i. Cemented by clay, Lapis arenaceus glu- 



tine argiilaceo. 



* Tht above m ntioned Breeds of thcmfelves muft demand 

 the diftin&ions her- made between them, but which perhaps 

 may feem to be carried too far, fince their particles are fo 

 big and plain, as to be eaiily known from one ano.her. 

 Tfaefe ftoiics arc a proof both of the fubverflons which the 

 mountains in many centuries have undergone, and of fome 

 hidden n caoa which Nature makes ufe of in thus cem-vnttng 

 diftVrent kinds of ilones together. Any certain bignefs for the 

 kernels or lump', in fuch compounds, before they defer ve the 

 name of Ereccia, cannot be determined, becaiife that depends 

 on a c fon, which every one is at liberty to imagine. 



At one place in the mountain called Hykiebergct, the kej n :)s 

 of porph) ry have a diameter of fix feet, while in other places 

 they are not bigger than walriuts. At Maflfewala the kernels 

 have a progreifive fize down to that of a -inc fandftone. JV/oli 

 of this kind of ftcae is fit for ornaments, though the work- 

 m.i: (hij - xtry difficult and coftly. 



a. With 



