EARTHS. AGGREGATE. 64. Arenarius, 
205 
‘HUatitms. Hard, grey, in the form of a ftalaaite. 
LaJJone M. /'«'•. ' 777 - P-^ 43 ; 
Found near Fontainbleau in France. 
^^rgarha- Confifting of tranfparent unequal grains, united by a ce- 
’■'w. mtnt of white chalk. 
Saxum quartzofum. Syft. nat. xii. 3. p. 74. 
Found in Nericia in Sviee/fx. 
Friable, confifting of black and grey grains united by a 
cement of white chalk. 
Saxum calcareo-arenof. Sv/t~ nat. xii, 3. p 73- n.j. 
Found in St. Helen' 1: friable, and exhibiiing when burnt a 
yellowifli and fandy calx. 
‘‘'^'onicus. Grey, hardening in the air, confifting of fmaller grains 
cemented by white chalk. 
Lapis arenaceus, &c. Crsnft. mineral. fe 8 . 274. 2. z- 
Qj^iadrun) albefcens, Wall.Jyft. min. i. p. 192. 
Calcareous fandftone. Kirnrian miner. \ . p. 362. 
Found in Lintoniaf and becomes yellowifli when burnt. 
‘^atiicus. In green tranfparent grains cemented by white marblf. 
Cronft. miner. fe 8 . 272. z. 1. 
Found near Backerskng in Norway. 
^“Icarius. Grey, in lefter grains conglutinated by a cement of chalk. 
Cos. partic. glareof. SyJ't.nat. xii. 3.^. 6z. n. 3. 
Calx Nepatica. It. Wgoth. zr. 
Found in the mountain Kttmekulle in Sweden, forming the loweft 
ftratum : when made red hot it flies to pieces with a violent 
noife. 
^adrum. Hardifti, Confiding of lefter grains conglutinated by a ce- 
ment of marl. 
Cos. partic. glareof. Sfjt.nat. xii. 3. />.6i. n z. 
Cos. partic. impalpab. IVall. jyft. i. p. 191. «. 4. 
Found in Britain, Germany, Sweden, France, he. grey, }el- 
lowifli, or reddifii, and forming horizontal or oblique cKl’Cs: 
under ground it is moill and eaiiiy cut, but hardens when ex- 
pofed to the air, and at length moulders, is bibulous when 
quite dry, and fcales off in a frolly air. It is principaiiy 
ufed in architcfliire. 
‘‘^Ipbureus, Confifting of grains conglutinated by a cement of fv.ina- 
ftoiie. 
Schwefelllein. Heidinger Phyf. Arh. cintr. I. 4. p. 7. 
Found in the fak-pits of Galiacia, 
