Helena, 



li<vcinicui» 



EARTHS. AGGREGATE. 64. Arenarius. 205 



itUlatklui^ Hard, grey, in the form of a ftalaclite. 

 ' Found near Fontainbleau in Frcnce. 



snargarita- Confiriing of trani'parent unequal grains, united by a ce- 

 rius. ment of white chalk. 



Saxum quartzcfum. Syft, n at. yiW, 3«/. 74. 

 iound in Nericiu in S^weden. 



Friable, confiftipg of black and grey grains united by \^ 

 cement of white chalk. ' 

 Saxum calcareo-'irenor. Syjt^ naU xii. 3. /> 73 «.. 7. 

 Found in St. Helen t: friable, and exhibiting when burnt a 

 yellowifli and fandy calx. 



Grey, hardening in the air, confining of fmaller grains 

 cemented by white chalk. 

 Lapis arcnaceus, kc, Cronft, mineral, feSi. 274. 2. ?. 

 Q^uadrum alhefcens. Wall. fyfr. ynin. \. p. 192. 

 Calcareous fandftone. Kirn.v an miner. \. p. 362. 

 Found in Li<voniai and becomes yellovvifti when burnt. 



In green tranfparent grains cemented by white marbl^. 



Cr'onjt. 7mner. feSi. 272. 2. I, 

 Found near Backerskog in Nornvay, 



Grey, in IcfTer grains conglutinated by a cement of chalk. 

 Cos. partic. giareol'. Sy/t. nat. xii. 3. p. 62. n. 3. 

 Calx Nepatica. //. Wgoth. 21. 

 Found in the mountain Kinnekulle in ^'vjeden, forming the loweit 



ftratum : when made red hot it flies to pieces witli a vioknc 



noife. 



^adrufn, Hardifh, confifting of lelTcr grains conglutinated by a ce- 

 ment of marl. 

 Cos. partic. glareof. Syjt.nat. xii. 3. />.6i. n 2. 

 Cos, partic. impal pah. JJ(all.Jyft. i. />. 191. n,^. 

 Found in Britain^ Germany, SiAjedcn, France, &c. grey, yel- 

 lowifh, or reddifh, and forming horizontal or oblique clefts: 

 under ground it is moift and eafily cut, but hardens when ex- 

 pofed to the air, and at length moulders, is bibulous wheii 

 quite dry, and fcales oif in a irolty air. Ic is principally 

 ufed in architecture. 



sulphureuu Confiding of grains conglutinated by a cement of fwlne- 

 ftone. 

 Schwefeldein. Beidi?iger Phyf. Arb, cintr. I. 4, />. 7. 

 Found in the ult-pits of Gallacia, 



aantcus. 



call 



canus. 



